Sirs, I noticed that my POP3 server in offline. I tried to restart dovecot, but got the error: [root@s2 dovecot]# [root@s2 dovecot]# /etc/init.d/dovecot restart Stopping Dovecot Imap: [FAILED] Starting Dovecot Imap: Error: Dovecot is already running with PID 1898 (read from /var/run/dovecot/master.pid) Fatal: Invalid configuration in /etc/dovecot.conf How do I restart it?