Now Plesk fully supports Dovecot mail server as a fast and efficient alternative to Courier for IMAP and POP3. With Dovecot sieve rules support, users can now set up server-based email filtering in mobile-friendly Horde and Roundcube webmail programs. Now it is also possible to set up out-of-office auto-replies directly in webmail.
Plesk 17.x presents security improvements for server services and customer websites. This becomes possible with the help of two well known third-party security applications: Fail2Ban, intrusion detection and IP banning system, and ModSecurity, the Web Application Firewall (WAF).