- Plesk for Linux
How to change the default certificates for SMTP, IMAP, and POP3 over SSL?
Note: In Plesk Onyx it is possible to secure Mail Server from Plesk GUI. Additional information can be found the following articles:
How to secure mail server with Let's Encrypt certificate
How to secure a mail server with an SSL certificate?
Note: The certificate secures the entire mail server and all domains on it. It is not possible to secure individual mail connections, such option is not possible in the functionality of mail servers Is there SNI support for SMTP/IMAP/POP3?
The certificate for SMTP over SSL is located in the following files:
- For Postfix MTA:
- For QMail MTA:
- For Dovecot:
- For a Courier-IMAP server (for IMAP4 and POP3 over SSL):
Note: When connecting to the mail server, make sure to use the domain name in the certificate issued during securing Plesk mail server.
For example, if the certificate was issued for
example.com should be specified as the connection string in mail client preferences for SMTP/POP3/IMAP servers.