Dovecot is a mail server capable of handling the IMAP and POP3 protocols. This interface allows you to configure various aspects of Dovecot’s behavior.

These checkboxes select which protocols Dovecot will listen on.

Note: cPanel’s Webmail system requires IMAP in order to function.

Note: If you select no checkboxes, the system will remove the mailserver RPM. The system will preserve all mailserver settings even if none is selected. To reinstall a mailserver RPM select one from the Mailserver Selection interface.

This option allows you to enable Dovecot to listen for IPv6 Address requests.

Note: You must select a protocol in the Protocols Enabled section before selecting IPv6 Enabled.

This setting will allow remote email clients to authenticate using unencrypted connections. When set to “no”, only connections originating on the local server will be allowed to authenticate without encryption. Selecting “no” is preferable to disabling IMAP in the Protocols Enabled section since it will force remote users to use encryption while still allowing webmail to function correctly.

This is a standard format list of the SSL ciphers Dovecot should use. Typically this will only need to be adjusted for PCI compliance."

This is a list of the SSL protocols Dovecot should use. Typically this will only need to be adjusted for PCI compliance."

Specifies the maximum number of mail (IMAP and POP3 servers) processes that may be running at one time.

The maximum memory usage of the IMAP and POP3 processes, in MB. These processes read mostly memory-mapped files, so setting a high limit should not affect your server’s performance.

Specifies the number of simultaneous IMAP connections that a single user (IP address) may make at one time.

Specifies the number of minutes between IMAP IDLE “OK Still here” messages. Increasing this may help increase battery life for some mobile clients.

Specifies the number of simultaneous POP3 connections that a single user (IP address) may make at one time.

This specifies how many spare authentication processes should be kept running to listen for new connections.

Specifies the maximum number of authentication processes that may be running at one time.

The maximum memory usage of the IMAP and POP3 login processes, in MB.

The master authentication process keeps a cache of validated logins so that it does not need to recheck the login credentials each time mail is retrieved. This specifies the amount of memory used for the cache, in kilobytes.

The time, in seconds, that failed logins will be stored in the authentication cache. A lower value may cause more work for the authentication server but decrease the likelihood of problems when passwords are updated.

The time in seconds that failed logins will be stored in the authentication cache. Lowering this value may cause more work for the authentication server but decrease the likelihood of problems when passwords are updated.

Specifies whether to use a new login process for each new POP3 or IMAP connection. Setting this to yes may improve the security of the Dovecot authentication processes, but doing so imposes a significant performance penalty on heavily loaded servers.

The time in seconds between updates to idle IMAP connections. Lowering this value will cause idle clients to see new messages faster, however lower values may also increase server load slightly. The default setting of 30 is recommended.

When this option is enabled, the system will remove messages in the Trash and Deleted Messages folders based on the expiration time configured below.

The number of days to keep messages before the Auto Expunge Trash function removes them. This function only works if the Auto Expunge Trash function is enabled.


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