Suddenly, I can not receive/send e-mail anymore on my server. When I do an ehlo <server IP-address> 25 from my desktop, i have no reply! Monit says: Port Response time connection failed to localhost:25 [SMTP] According ISPConfig 2.2.5 pop3 & smtp are running… I restarted postfix already but that did not help. So postfix seems to be running. What can I do now to solve this.