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## Installing Custom SSL Certificates for Qmail or Courier-IMAP Mail Servers

To securely exchange mail data with Parallels Plesk Panel server, you may need to install custom SSL certificates on the Parallels Plesk Panel server. Specifically, SSL certificates can be installed for the Qmail mail transfer agent and the Courier-IMAP mail server that supports the IMAP and POP3 protocols.

To install custom SSL certificates, you need to download the certificates to the Parallels Plesk Panel server and then replace the installed default SSL certificates for Qmail and Courier-IMAP servers with the downloaded custom certificates.

This section describes procedures for installing custom SSL certificates for Qmail and Courier-IMAP servers.

In this section: Installing SSL Certificate for Qmail Installing SSL Certificates for Courier-IMAP Mail Server