- Plesk 12.0 for Linux
Unable to configure auto reply in Horde webmail.
According to Plesk 12 Release Notes configuration of auto reply in Horde is only possible if Dovecot is set as IMAP/POP3 server.
Switch mail server to use Dovecot as mail delivery agent:
Log in to Plesk.
Tools & Settings > Updates and Upgrades > Add/Remove Components > Mail hosting features
Select Dovecot secure IMAP server with Sieve support as IMAP/POP3 server.