Plesk/MU version, OS, architecture?
Relevant messages from /usr/local/psa/var/log/maillog?
It happened with Plesk 11 and 11.5 on 11.5 now. CentOS 5.5 64bit
Messages from:
Jun 28 04:34:25 aandcmediaconsulting courier-pop3d: Connection, ip=[::ffff:127.0.0.1]
Jun 28 04:34:25 aandcmediaconsulting courier-pop3d: LOGOUT, ip=[::ffff:127.0.0.1]
Jun 28 04:34:25 aandcmediaconsulting courier-pop3d: Disconnected, ip=[::ffff:127.0.0.1]
Jun 28 04:34:25 aandcmediaconsulting courier-pop3s: Connection, ip=[::ffff:127.0.0.1]
Jun 28 04:34:25 aandcmediaconsulting courier-pop3s: LOGOUT, ip=[::ffff:127.0.0.1]
Jun 28 04:34:25 aandcmediaconsulting courier-pop3s: Disconnected, ip=[::ffff:127.0.0.1]
Jun 28 04:39:27 aandcmediaconsulting courier-imapd: Connection, ip=[::ffff:127.0.0.1]
Jun 28 04:39:27 aandcmediaconsulting courier-imapd: LOGOUT, ip=[::ffff:127.0.0.1], rcvd=12, sent=365
Jun 28 04:39:27 aandcmediaconsulting courier-imaps: Connection, ip=[::ffff:127.0.0.1]
Jun 28 04:39:27 aandcmediaconsulting courier-imaps: LOGOUT, ip=[::ffff:127.0.0.1], rcvd=12, sent=356
Jun 28 04:39:27 aandcmediaconsulting courier-pop3d: Connection, ip=[::ffff:127.0.0.1]
Jun 28 04:39:27 aandcmediaconsulting courier-pop3d: LOGOUT, ip=[::ffff:127.0.0.1]
Jun 28 04:39:27 aandcmediaconsulting courier-pop3d: Disconnected, ip=[::ffff:127.0.0.1]
Jun 28 04:39:27 aandcmediaconsulting courier-pop3s: Connection, ip=[::ffff:127.0.0.1]
Jun 28 04:39:27 aandcmediaconsulting courier-pop3s: LOGOUT, ip=[::ffff:127.0.0.1]
Jun 28 04:39:27 aandcmediaconsulting courier-pop3s: Disconnected, ip=[::ffff:127.0.0.1]
Jun 28 04:44:29 aandcmediaconsulting courier-imapd: Connection, ip=[::ffff:127.0.0.1]
Jun 28 04:44:29 aandcmediaconsulting courier-imapd: LOGOUT, ip=[::ffff:127.0.0.1], rcvd=12, sent=365