POP3 vs IMAP: Which protocol allows you to receive email on any device. How to set up mail on android

You can work with letters not only through the Yandex.Mail web interface, but also using various mail programs installed on your computer.

Configure a program via IMAP

When using the IMAP protocol, the mail program synchronizes with the server and preserves the folder structure of your mailbox. The letters you send through the mail program will be stored not only on the computer, but also on the server, and you will be able to access them from various devices.

Before configuring your mail program, enable the IMAP protocol:

To configure the mail program via IMAP, you must specify the following data:

Incoming mail

• connection protection - SSL;
• port - 993.

• connection protection - SSL;
• port - 465.

. ru "

IMAP support will be enabled automatically the first time you log into your email program.

When using the POP3 protocol, all messages from folders that you specify in the menu Setting → Mail programswill be saved by the mail program to your computer in the Inbox folder. If necessary, you can set up filters in your email program to automatically move letters to the required folders. Emails you send will only be stored on your computer.

Note. When downloading messages from a server using the POP3 protocol, Yandex.Mail automatically saves copies of messages on the server, but you can delete messages manually using the web interface. If you want to delete messages using your mail program, use the IMAP protocol.

Before configuring your mail program, enable the POP3 protocol:

To configure the mail program using the POP3 protocol, you must specify the following data:

Incoming mail

• connection protection - SSL;
• port - 995.

• mail server address - smtp.yandex.ru;
• connection protection - SSL;
• port - 465.

To access the mail server, enter your Yandex username and password (or if you've enabled two-factor authentication). If you configure receiving mail from a mailbox of the form " [email protected]ru ", the login is the part of the address before the "@" sign. If you use, you must specify the full mailbox address as a login.

You can configure receiving emails via POP3 from any folder, including Spam. To do this, open the menu Setting → Mail programs and mark the folders you want.

By default, messages are not marked as read when mailbox content is downloaded by email programs. If you want to mark received emails as read, enable the corresponding option.

Problems with the mail program

This step-by-step guide will help you troubleshoot your email program problems.

Select a problem:

What message did you receive?

If a message appears stating that there is no connection to the server, try logging into Yandex.Mail with the same username and password that you use in the program. Enter your username and password manually, without using the ones stored in the browser.

Make sure that the protocol \\ n you want to use is enabled in the Mail programs settings section. \\ N

Make sure that you have specified the following server parameters \\\\ n in the mail program settings: \\\\ n \\\\ n \\\\ n

If you are using IMAP

\\\\ n
• mail server address - imap.yandex.ru;
\\\\ n
• connection protection - SSL;
\\\\ n
• port - 993.
\\\\ n

\\\\ n
• mail server address - smtp.yandex.ru;
\\\\ n
• connection protection - SSL;
\\\\ n
• port - 465.
\\\\ n

\\\\ n \\\\ n \\\\ n \\\\ n

If you are using POP3

\\\\ n \\\\ n \\\\ n Incoming mail \\\\ n \\\\ n

\\\\ n
• mail server address - pop.yandex.ru;
\\\\ n
• connection protection - SSL;
\\\\ n
• port - 995.
\\\\ n

\\\\ n
• mail server address - smtp.yandex.ru;
\\\\ n
• connection protection - SSL;
\\\\ n
• port - 465.
\\\\ n

\\\\ n \\\\ n \\\\ n \\\\ n \\\\ n

For details on how to check server settings in different \\\\ n mail programs, see the section.

\\\\ n ")])) \\"\u003e

Make sure that you have specified the following server parameters \\ n in the mail program settings:

If you are using IMAP

\\ n
• mail server address - imap.yandex.ru;
\\ n
• connection protection - SSL;
\\ n
• port - 993.
\\ n

\\ n
• mail server address - smtp.yandex.ru;
\\ n
• connection protection - SSL;
\\ n
• port - 465.
\\ n

\\ n \\ n \\ n \\ n

If you are using POP3

\\ n \\ n \\ n Incoming mail \\ n \\ n

\\ n
• mail server address - pop.yandex.ru;
\\ n
• connection protection - SSL;
\\ n
• port - 995.
\\ n

\\ n
• mail server address - smtp.yandex.ru;
\\ n
• connection protection - SSL;
\\ n
• port - 465.
\\ n

\\ n \\ n \\ n \\ n \\ n

Encryption of transmitted data.

\\ n \\ n ")]))"\u003e

Make sure that the protocol you want to use is enabled in the settings section.

Make sure that you have specified the following server parameters \\ n in the mail program settings: \\ n \\ n \\ n

If you are using IMAP

\\ n \\ n \\ n Incoming mail \\ n \\ n

\\ n
• mail server address - imap.yandex.ru;
\\ n
• connection protection - SSL;
\\ n
• port - 993.
\\ n

\\ n
• mail server address - smtp.yandex.ru;
\\ n
• connection protection - SSL;
\\ n
• port - 465.
\\ n

\\ n \\ n \\ n \\ n

If you are using POP3

\\ n \\ n \\ n Incoming mail \\ n \\ n

\\ n
• mail server address - pop.yandex.ru;
\\ n
• connection protection - SSL;
\\ n
• port - 995.
\\ n

\\ n
• mail server address - smtp.yandex.ru;
\\ n
• connection protection - SSL;
\\ n
• port - 465.
\\ n

\\ n \\ n \\ n \\ n \\ n

For more information on how to check server settings in different \\ n mail programs, see the Encrypting Transmitted Data section.

\\ n ")]))"\u003e

Make sure that you have specified the following server parameters in the settings of your mail program:

If you are using IMAP

Incoming mail

• mail server address - imap.yandex.ru;
• connection protection - SSL;
• port - 993.

• mail server address - smtp.yandex.ru;
• connection protection - SSL;
• port - 465.

If you are using POP3

Incoming mail

• mail server address - pop.yandex.ru;
• connection protection - SSL;
• port - 995.

• mail server address - smtp.yandex.ru;
• connection protection - SSL;
• port - 465.

For more information on how to check the server settings in different mail programs, see the Encrypting Transmitted Data section.

If the message "Authentication required" appears, "Sender address rejected: Access denied" or "Send auth command first", authorization on the Yandex SMTP server is disabled in the mail program settings. Make sure the option is enabled User authentication (for Outlook Express) or SMTP Authentication (for The Bat!).

If a message appears "Sender address rejected: not owned by auth user", the address from which you are trying to send a letter does not match the one under whose login you are authorized on the SMTP server. Make sure that the address from which you use in the SMTP authorization settings is specified as the return address in the mail program settings.

If a message appears Login failure or POP3 disabled, the mailer cannot access the mailbox using the POP3 protocol. Make sure that the correct password for the mailbox is entered and that POP3 access is enabled in the settings section.

If a message appears "Message rejected under suspicion of SPAM", the content of your message has been recognized by Yandex.Mail as spam. To solve the problem, open Yandex.Mail and send any one letter in the form of a test. This will prove to the system that it is not a robot that sends letters.

If the mail program does not accept or does not send letters, check the correctness of the settings of your mail program, as well as the settings for connecting your computer to the Internet.

If you are using an antivirus program, firewall, or proxy server, disable them and check if the problem reproduces.

Read the step-by-step instructions for finding missing emails. Before starting work .

Select a problem:

When you delete messages, they go to the Deleted Items folder and are stored in it for 30 days. During this period, you can restore them:

Go to the Deleted Items folder.

Highlight the letters you want.

Click the To folder button.

If more than a month has passed since their deletion, the messages cannot be recovered - they were permanently deleted from Yandex.Mail servers.

If the emails are not in the folder where they should be, then most likely they ended up in another folder, for example, Deleted Items or Spam. If you remember the name or address of the sender, part of the text of the letter or the subject - try to search for letters in all folders of your mailbox.

Did you find the letters?

You can recover emails:

Go to the folder where the letters were found.

Highlight the letters you want.

Click the To folder button.

Select from the list the folder where you want to move the messages - for example, Inbox.

Why letters go missing and how to avoid it

The Deleted messages folder is stored for 30 days, in the Spam folder - 10 days. After that, they will be permanently deleted from Yandex servers. Why letters can get into these folders without your knowledge:

Another user has access to your mailbox

Emails can be deleted by a user who has access to your mailbox: perhaps you forgot to end the session after working on someone else's device. To end the session, click the link in the account menu Logout on all devices... You can also do this on the page - using the link Log out on all computers.

Letters disappear in the mail program

configure the program using the POP3 protocol

Configured a rule that deletes or moves letters. Letters disappear in the mail program

If you use the mail program and delete letters in it, then they disappear on. This happens because your program is configured using the IMAP protocol - the structure of the box on the service is synchronized with the structure of the box in the program. To delete messages only in the program, but leave them in Yandex.Mail, you can configure the program using the POP3 protocol, but we recommend that you do not do this: messages may not sync correctly with the server.

Configured a rule that deletes or moves messages Specify reliable ones in Yandex.Passport and link them to your account. Perhaps our security system considered your account suspicious and blocked the mailbox. Most often this happens due to the fact that a phone number is not tied to the mailbox or a fictitious name and surname are indicated in the Passport. It usually takes a couple of hours to unblock.

If you delete messages in the mail program, but they are still in their folders on the Yandex.Mail website, then most likely your mail program is configured using the POP3 protocol. Due to the peculiarities of the POP3 protocol, messages in the mail program may not synchronize correctly with the server. It is recommended to use the IMAP protocol to work with Yandex.Mail. For information on how to reconfigure your email client from POP3 to IMAP, see Migrating from POP3.

If the mail program does not display sent messages, then most likely your mail program is configured using the POP3 protocol. Due to the peculiarities of the POP3 protocol, messages in the mail program may not synchronize correctly with the server. It is recommended to use the IMAP protocol to work with Yandex.Mail. For information on how to reconfigure your email client from POP3 to IMAP, see Migrating from POP3.

The report always indicates the reason for non-delivery. For the most common causes, see web / letter / create.html # troubleshooting__received-report.

If, when activating SSL encryption in your mail program, you receive errors about an incorrect certificate, make sure that the mail program and the operating system are configured correctly:

• On a computer (no lags and "Dates from the future"). If the date is incorrect, the system mistakenly determines that the certificate has not yet expired or has already expired.
• All are installed.
• Checking HTTPS connections is disabled in your antivirus settings. You can change the antivirus settings according to our instructions for Kaspersky Internet Security and ESET NOD32 Smart Security in the Security certificate errors section.

Add a certificate to the list of trusted certificates manually (Windows)

Attention. If you are not sure if you can install the certificate yourself, contact a specialist.

To add a certificate to the list of trusted certificates:

Download the certificate. (If the link opens directly in your browser, click CTRL + S and save the file to your computer; you don't need to copy text from the file.)

Open the Start Menu.

Enter certmgr.msc in the search box and press Enter.

In the program window, in the folder tree, click on the folder Trusted Root Certification Authorities.

In the right part of the window, right-click on Certificates and select All tasks → Import.

Click the Browse button and select the CA.pem file you downloaded earlier. Click Next.

This article has covered the most commonly used email protocols on the Internet - POP3, IMAP, and SMTP. Each of them has a specific function and way of working. The content of the article explains which configuration is best suited to the specific needs of the user when using an e-mail client. It also reveals the answer to the question of which protocol supports e-mail.

What is POP3?

Version 3 (POP3) is a standard postal protocol used to receive e-mail from a remote server to a local mail client. Allows you to download messages to your local computer and read them even when the user is offline. Please note that when you use POP3 to connect to your account, messages are downloaded locally and deleted from the email server.

By default, POP3 runs on two ports:

port 110 is the unencrypted POP3 port;

port 995 - this must be used if you want to securely connect to POP3.

What is IMAP?

Internet Message Access Protocol (IMAP) is a protocol for receiving e-mail messages that is used to access it on a remote web server from a local client. IMAP and POP3 are the two most commonly used protocols for receiving emails and are supported by all modern email clients and web servers.

POP3 assumes that your email address is only accessible from one application, while IMAP allows you to log in from multiple clients at the same time. This is why IMAP is better if you are going to access your email from different locations or if your messages are managed by multiple users.

IMAP runs on two ports:

port 143 is the default unencrypted IMAP port.

port 993 - this must be used if you want to connect securely using IMAP.

What is SMTP?

Protocol is a standard protocol for sending e-mail over the Internet.

SMTP works on three ports:

port 25 is unencrypted by default;

port 2525 - it opens on all SiteGround servers if port 25 is filtered (by your ISP for example) and you want to send unencrypted emails using SMTP.

port 465 - This is used if you want to send messages securely using SMTP.

What are the protocols for e-mail exchange? Concepts and terms

The term "email server" refers to the two servers required to send and receive emails, that is, SMTP and POP.

The Incoming Mail Server is the server associated with your email account. There can be no more than one incoming mail server for it. To access incoming messages, you need an email client - a program that can receive email from an account, allowing the user to read, forward, delete, and reply to messages. Depending on your server, you can use a dedicated email client (such as Outlook Express) or a web browser. For example, Internet Explorer is used to access email-based accounts. Emails are stored on the incoming mail server until they are downloaded. Once you have downloaded your mail from the mail server, you cannot do it again. To successfully download the data, you must enter the correct settings in your email program. Most incoming mail servers use one of the following protocols: IMAP, POP3, HTTP.

Outgoing mail server (SMTP)

This is a server used only for sending emails (for transferring them from your email client program to the receiver). Most outgoing mail servers use Protocol) to send mail. Depending on your network settings, the outgoing mail server may belong to your ISP or the server on which you are setting up your account. Alternatively, you can use a subscription-based SMTP server that will allow you to send emails from any account. Due to spam issues, most outbound mail servers do not allow you to send emails unless you are logged into your network. An open relay server will allow you to use it to send emails, whether you belong to its network group or not.

Email ports

For networks, a port refers to the endpoint of a logical connection. The port number determines its type. The default email ports are:

POP3 - port 110;

IMAP - port 143;

SMTP - port 25;

HTTP - port 80;

secure SMTP (SSMTP) - port 465;

secure IMAP (IMAP4-SSL) - port 585;

IMAP4 over SSL (IMAPS) - port 993;

Secure POP3 (SSL-POP) - port 995.

Email protocols: IMAP, POP3, SMTP and HTTP

Basically, the protocol refers to the standard method used at each end of the communication channel. To deal with email, you must use a dedicated client to access the mail server. In turn, they can exchange information with each other using completely different protocols.

IMAP protocol

IMAP (Internet Messaging Access Protocol) is the standard protocol for accessing email from your local server. IMAP is a client / server protocol in which email is received and the data is stored by your internet server. Since it only requires a small data transfer, it works well even on a slow connection, such as when connecting with a modem. When trying to read a specific email message, the client downloads data from the server. You can also create and manage folders or mailboxes on the server, delete messages.

POP3 protocol

Post Office Protocol 3 (POP) e-mail protocol provides a simple, standardized way for users to access their mailboxes and download messages to their computers.

With POP, all of your email messages will be downloaded from the mail server to your local computer. You can also leave copies of your emails on the server. The advantage is that after downloading your messages, you can disconnect your internet connection and read your e-mail at your leisure without incurring additional communication costs. On the other hand, with this protocol, you receive and download a lot of unwanted messages (including spam or viruses).

SMTP protocol

The protocol is used by the Mail Transfer Agent (MTA) to deliver electronic messages to a specific recipient server. SMTP can only be used to send emails, not to receive them. Depending on the settings of your network or ISP, you may only use SMTP under certain conditions.

HTTP protocols

HTTP is not a protocol designed for email communication, but it can be used to access your mailbox. It is also often referred to as web email. It can be used to compose or receive emails from your account. Hotmail is a good example of using HTTP as the email protocol.

Managed file transfers and networking solutions

Your ability to send and receive email is primarily due to three TCP protocols. These are SMTP, IMAP and POP3.

SMTP

Let's start with SMTP because its main function is different from the other two. SMTP, or Simple Mail Transfer Protocol, is mainly used to send email from an email client (such as Microsoft Outlook, Thunderbird, or Apple Mail) to an email server. It is also used to relay or forward mail messages from one mail server to another. This is necessary if the sender and recipient have different email providers.

SMTP, which is specified in RFC 5321, uses port 25 by default. It can also use port 587 and port 465. The latter, which was introduced as the port of choice for secure SMTP (a.k.a. SMTPS), is deprecated. But in reality, it is still used by several postal service providers.

POP3

Post Office Protocol, or POP, is used to retrieve e-mail messages from The latest version that is widely used is version 3, hence the term "POP3".

POP version 3, specified in RFC 1939, supports extensions and several authentication mechanisms. Authentication features are required to prevent attackers from gaining access to user messages.

The POP3 client receives email as follows:

connects to the mail server on port 110 (or 995 for SSL / TLS connections);

deletes copies of messages stored on the server;

disconnects from the server.

Although POP clients can be configured so that the server can continue to store copies of downloaded messages, the steps above are common practice.

IMAP

IMAP, especially the current version (IMAP4), is a more complex protocol. This allows users to group related messages and place them in folders, which in turn can be organized hierarchically. It is also equipped with message flags that indicate whether a message has been read, deleted, or received. It even allows users to search server mailboxes.

Operation logic (imap4 settings):

• connects to the mail server on port 143 (or 993 for SSL / TLS connections);

  retrieves email messages;

  serves to connect until the mail client application is closed and download messages on demand.

Please note that messages are not deleted on the server. This can have serious consequences. The IMAP specifications can be found in RFC 3501.



Choosing between IMAP and POP3

Since the basic function of SMTP is fundamentally different, the dilemma of choosing the best protocol usually involves only IMAP and POP3.

If storage space on the server is important to you, then choose POP3. A server with limited memory is one of the main factors that can make you support POP3. Because IMAP leaves messages on the server, it can consume memory space faster than POP3.

If you want to access your mail at any time, then IMAP is the best choice. There is one good reason why IMAP was designed to store messages on a server. It is used to search for messages from multiple devices - sometimes even simultaneously. So if you have an iPhone, Android tablet, laptop, and desktop and want to read email from any or all of these devices, then IMAP is the best choice.

Synchronization is another benefit of IMAP. If you're accessing your email messages from multiple devices, chances are you'll want them all to reflect whatever actions you've taken.

For example, if you read messages A, B, and C, you want them to be marked as “read” on other devices as well. If you deleted letters B and C, then you want the same messages to be deleted from your mailbox on all gadgets. All of these syncs can only be achieved if you are using IMAP.

Because IMAP allows users to organize their messages in a hierarchical order and place them in folders, it helps users to better organize their correspondence.

Of course, all IMAP functionality comes at a price. These solutions are more difficult to implement, and ultimately the protocol consumes a lot more CPU and RAM, especially when it is performing the synchronization process. In fact, high CPU and memory usage can happen on both the client side and the server side if there are a ton of messages to sync. From this point of view, the POP3 protocol is less expensive, although less functional.

Privacy is also one of the concerns that will be highly dependent on end users. They would generally prefer to download all emails and not leave copies of them on an unknown server.

Speed \u200b\u200bis an advantage that varies and depends on the situation. POP3 has the ability to download all email messages when connected. And IMAP can, if necessary (for example, when there is not enough traffic), download only message headers or certain parts and leave attachments on the server. Only when the user decides that the remaining parts are worth downloading will they become available to him. Therefore, IMAP can be considered faster.

However, if all messages on the server have to be downloaded every time, then POP3 will work much faster.



As you can see, each of the described protocols has advantages and disadvantages. It's up to you to decide which features or capabilities are more important.

Also, the preferred way to access the e-mail client determines the preference of the protocol. Users with only one machine and using webmail to access their new emails will appreciate POP3.

However, users who exchange mailboxes or access their emails from different computers will prefer IMAP.

Spam firewalls with SMTP, IMAP and POP3

Most spam firewalls only deal with and protect SMTP. The servers send and receive SMTP email and they will be checked by the spam firewall at the gateway. However, some spam firewalls provide the ability to protect POP3 and IMAP4 when external users need these services to access their email.

SMTP firewalls are transparent to end users; there are no configuration changes for clients. Users still receive and send email messages to the email server. For example, Exchange or Dominos must configure proxy-based message routing to the firewall when sending e-mail, as well as provide the ability to send mail from the firewall.

In a nutshell

In the first of a two-part article, I'll provide an overview of using the POP3 and IMAP4 protocols with Exchange 2007. First, I'll explain some of the differences between the two protocols. Then I'll go over several scenarios where they can be used, starting with the necessary configuration details, including how to establish a client connection.

In the second part of this article, I'll show you some advanced configuration settings and touch on best practices for using these two protocols. Finally, I'll take a look at what's to come for POP3 and IMAP4 in Exchange 2007 SP1 (Service Pack 1).

Introduction

POP3 (Post Office Protocol 3) and IMAP4 (Interactive Email Access Protocol 4) are protocols that allow access to email from / on a remote server. Both of these protocols are widely used outside the enterprise to access personal mail with an ISP, however I have found that they are sometimes used in a business setting such as on a mobile phone.

The key difference between these protocols is that IMAP4 provides access to mail on the server and does not download it to the local computer, compared to POP3, which downloads mail to the local computer (note: it is also possible to leave a copy on the server). POP3 only downloads mail from the Inbox, although other local folders can be created, while IMAP4 allows access to all mailbox folders on the server. Compared to other remote access methods such as OWA (Outlook Web Access), no other protocol offers more advanced features such as scheduling, setting and managing contacts.

There are many changes associated with these protocols in Exchange 2007. First of all, they are now part of Exchange 2007 and are not installed as part of IIS. Second, and more importantly, there is no GUI for managing POP3 and IMAP4 (at least not before SP1), unlike Exchange 2003. One thing remains unchanged: the fact that both of these protocols are mail retrieval protocols; neither one nor the other allows you to send mail. To do this, you need to send through an SMTP server. In the next paragraph, I'll show you how.

Install / Run POP3 and IMAP4

As mentioned above, POP3 and IMAP4 are part of the CAS (Client Access Server) role in Exchange 2007. This means that their use does not require additional installation. They just need to be activated. To do this, do the following:

Start the appropriate service first and set the startup mode to automatic. See Figure 1:

Then start this service, see Figure 2:

When the PowerShell command returns to the message, it's worth checking to see if the services were actually started, since that's not what PowerShell returns. To do this, run the commands shown below in Figure 3:

Note for IMAP4: Replace “POP3” in the examples above with IMAP4.

With the server protocol enabled, make sure that the user who needs access has the appropriate protocol enabled for use. To do this, go to the user properties (properties) and look at the Mailbox Features tab. See Figure 4. Alternatively, you can use the PowerShell commands below:

Set-CASMailbox -Identity mailboxname -PopEnabled $ true Set-CASMailbox -Identity mailboxname -IMAPEnabled $ true

Note: $ false disables the protocol for the specified user.

With the email lookup protocol set up, we now need to enable mail forwarding. In Exchange 2007, SMTP mail flow is associated with both the Hub Transport (HT) server role and the Edge Transport (ET) role. For both, you can install connectors to allow receiving and sending mail. However, in this case, you would rather use an HT server to forward mail, since ET is not part of AD's product line.

Your HT server will be in the best position to authenticate whoever needs to forward mail, which is much better than allowing mail to be forwarded without authentication.

By default, the HT server already has a suitable connector installed and expects you to authenticate and provide mail. This is the “Client HTServerName” connector. Looking at its properties (Figure 5), you will immediately notice the port that this connector is listening on. This is port 587. Yes, this is an SMTP connector, but instead of using port 25, the standard for communication between SMTP servers, port 587 is used, since this is the standard for SMTP mail received from client software.

Having covered how to start POP3 and IMAP4 access and provide transport for sending outgoing mail, I'll go ahead and walk through the actual client setup. You will find that it is not as easy as you might think!

Client Installation: Authentication and Ports

Although Outlook Express 6 is installed on most computers, I decided to use the new Windows Live Mail Desktop client to demonstrate client installation due to an Outlook Express issue that I'll cover below. After opening the client, I entered the account setup area as follows:

1. Select “Accounts” from the “Tools” menu.
2. To create a new account, click “Add” and the selected “Email Account”.
3. Then enter your username, email address (in my case, “imap” and accordingly [email protected]) and login credentials. Also check the box next to “Manually configure server settings for e-mail account”. See Figure 6.
4. Now select the protocol (IMAP or POP3) and enter the server details for receiving and sending mail, which in my case were the same - “e2k7cas-ht.exchange.local”. See Figure 7.

After completing the account setup as shown above, you may have noticed a few differences from what you expected. In Exchange 2007, the default settings are slightly more robust than in previous versions. By default, Exchange 2007 requires secure SSL / TLS connections, which means verifying client connections over a secure port. For IMAP this is port 993, and for POP3 it is port 995. When using an SSL / TLS connection, as with HTTPS in OWA, it is important to ensure that the client computer trusts the path of the certificate used to encrypt traffic, otherwise an error will occur, as shown in Figure 8 ...

The steps above show you how to establish a connection in the most secure way. However, you can loosen the settings with the “set-popsettings –logintype” or “set-imapsettings –logintype” commands. These commands display the following options:

• PlainTextLogin (Plain Text Registration)
• PlainTextAuthentication
• SecureLogin (Secure registration)

Using the PlainTextLogin option opens everything, allows connections over standard ports (not TLS: 110 for POP3 and 143 for IMAP4). It also allows plain text passwords to be used on the network.

The PlainTextAuthentication option also allows connections over standard ports (not TLS), but requires secure passwords, as when used with the Secure Password Authentication option on the client.

Finally, the SecureLogin option is assigned by default, as discussed in the analysis above. After making any changes to these settings, restart the corresponding service for them to take effect. I would leave the default settings as the others are simply insecure.

Note: If you are trying to make a change using Outlook Express 6 or earlier, then you will have a problem configuring the SMTP server to use SSL / TLS over port 587. The problem is that Outlook Express can only deal with the explicit protocol TLS over port 25. Both explicit and implicit TLS protocols are outlined below:

Explicit TLS: In order to establish SSL communication, explicit security requires the client to issue a special command (STARTTLS) to the server after the connection is established.

Implicit TLS: Implicit security automatically starts with an SSL connection as soon as the client connects to the server. With implicit security, the server defines a special port for the client (for POP3 and IMAP4 - 995 or 993) for secure connections.

If you want to continue using SSL / TSL with Outlook Express 6, you can use an auto-installed SMTP connector that is configured to use SSL / TLS on port 25 to solve this problem. But it is probably best to separate the traffic to the new connector. , receiving at a different IP address, but also on port 25.

Summary

As you can see, both the configuration and security of the IMAP4 and POP3 protocols have undergone some changes in Exchange 2007. Hopefully, you will find that there are many more functional access methods in Exchange 2007. IMAP4 and POP3 provide a suitable and secure method for situations where more functional methods are not available.

In part one, I looked at how to configure IMAP4 and POP3 for use with Exchange 2007 and then establish a client connection. In this part, I'll cover the more advanced options and settings for IMAP4 and POP3, and also look at the new administrative GUI features that we'll get into with SP1.

If you receive some emails on one PC and others on another, this can cause problems. Since it does not use the IMAP protocol.

I can assume that your wife's email client is configured to use the legacy POP3 protocol. It worked fine when most had one computer and not a smartphone. But since people use multiple computers and mobile devices to access their mail, this is no longer the case.

When you point your email client ( e.g. Outlook) to receive mail, the POP3 protocol moves new messages from the mail service server to your client, and deletes them from the server. If you check mail on two computers using the POP3 protocol, some messages will be available on one computer, and others only on the other.

Here are two ways to get around this problem:

Use the best protocol

Unlike POP3, IMAP is used to synchronize the client software with the server. All emails will be available on both devices. When you delete an email in your client, the IMAP protocol also deletes it from the server.

In Outlook 2016 ( which by default uses the POP3 protocol), you cannot directly change the account protocol. But you can create a new account and delete the old one:

1. In Outlook go to the menu File - Account Settings - Account Settings:

1. The dialog box “ Account settings". Click on the "Create" button;
2. In the master “ Add account"Select" Manual setting" or " Additional server types» ( in the lower left corner):

1. On the next page, select POP or IMAP. ( Yes, this is one of the options);
2. Please provide all required information. Make sure IMAP is selected as the account type;
3. You now have two accounts serving the same email address. Go back to your Inbox and drag emails from your old account to your new one;
4. Return to the Accounts dialog box, select the old account configured for POP3 and click on the Delete button.

Use a web client

If you check your mail through a mail service, and not through a program on a PC, downloading letters to one or another computer is not a problem.

You can also use a trusted web-based email service like Gmail. You will need to create a new Gmail account, but you can configure Gmail to send and receive emails from any other email service by configuring it over IMAP:

1. In Gmail, click on the tool icon located in the upper right corner and select "Settings";
2. Go to the " Accounts and imports»;
3. In chapter " Send email as"Click on the button" Add another email address"And follow the instructions of the setup wizard;
4. Go to the section " Checking mail from other accounts (using POP3)", Click on the button" Add POP3 Email Account”And follow the instructions of the setup wizard.

Talking about collecting mail in my articles, I remembered the nuances of collecting from the GMail mail service. The fact is that it is with this mail service that problems most often arise during the collection of mail. All because of its powerful security, which sometimes reaches the level of insanity :) I, of course, only FOR the high security of any services, but in the case of GMail it sometimes goes beyond all boundaries. For example, we are trying to collect mail from our Gmail inbox, but the process does not go, because Google blocks the connection attempt for no particular reason. Having faced a similar problem several times, I decided to write about the causes, possible variants of the problem and how to solve it.

Problems that often arise when collecting emails from GMail mailboxes and their solution

When collecting letters from any Gmail boxes, very often users encounter an error "Server denied POP3 access for given username and password".

Below we will analyze 2 main problems due to which such an error can occur and how to fix them.

Of course, such an error can also occur due to an incorrectly entered username and password from the second mail. As trivial as it sounds, make sure you enter this information exactly right!

Problem # 1. POP3 access is not enabled in the connected Gmail inbox

Before digging into the security side, you need to make sure that POP access is enabled in your plug-in box.

To check if POP access is enabled, go to the mail settings (gear-shaped button) and on the Forwarding and POP / IMAP tab, in the POP access section, check the Enable POP for all emails box.

If this function is not enabled there, then you will not be able to connect the box! If POP access is enabled, then look further ...

Problem # 2. Blocking access to connected mail for security reasons Google

As a rule, access to connected mail can be blocked due to the suspicious location from where the second mail is entered and / or due to the suspicious application from where the login is performed. Everything would be clear if this system always worked correctly for Google. But very often it happens that access is blocked and a message about blocking access is received on the plug-in, while some strange location is indicated (for example, New York) and an unsafe application is reported. Example of a letter:

And this despite the fact that the entrance to the second box is performed exactly from the same computer as in the main one, the location is the same (obviously not the United States) and at the same time there can be no question of any application, all the more insecure :) That is. Google can be 100% wrong in the location, as well as in the fact that you are trying to enter the mail through some application.

Several times I encountered a similar problem and in all cases the location was determined incorrectly and no programs were installed on the computer at all that could somehow change the IP address, which could change the location.

Decision

First of all, if access to connected mail is blocked, you need to:

Conclusion

These are the nuances that can be when setting up the collection of mail from Gmail boxes. The collection process itself is simple, there are no complex settings, as in any other services, but security is often “naughty”, goes over the edge and causes inconvenience. Hopefully the information in this article helps someone.