Hi there again. I have been digging around for hours trying to work out what I may have done wrong. I am hoping someone here can help. Mail client tells me POP3 error occurred. server responded. Check in ISPConfig and sure enough its offline. Restarting the server will bring it back up for a short time. Mail log shows no fatal errors and the only warnings are where a IP address fails to be verified: warning: 18.104.22.168: address not listed for hostname hermanice.nasi.cz I have installed munin and monit recently. I work for the ISP and have checked that there is no blacklisting etc blocking my server or IP. Also routing has also been doublechecked.