Hello! I created a Perfect Wheezy Server with this tutorial: https://www.howtoforge.com/perfect-server-debian-wheezy-apache2-bind-dovecot-ispconfig-3 I have several users, which are connecting to the mailserver from the same office/IP. The connection to the mailserver (IMAP, SMTP) isn't stable. I configured the mail_max_userip_connections for dovecot already. Fail2Ban is blocking the IP, because of too many connections. How could I reconfigure Fail2Ban to get rid of this problem. Code: 2015-02-09 17:14:59,975 fail2ban.actions: WARNING [dovecot-pop3imap] Unban IPADDRESS 2015-02-09 17:15:20,002 fail2ban.actions: WARNING [dovecot-pop3imap] Ban IPADRRESS 2015-02-09 17:25:20,591 fail2ban.actions: WARNING [dovecot-pop3imap] Unban IPADDRESS (IPADDRESS = address of the office - maximum of 50 connections) I understand this security mechanism, but the server is prepaired for these 50 connections from this office. I already had a look to the jail.conf from Fail2Ban, but everything is disabled exept of "SSH". How could I reconfigure Fail2Ban? I would really appreciate your help. Best! To the admins: How could I rename the title of this thread?