How To: Upgrade to Clam AntiVirus 0.95
Sat, 2010-04-17 08:31 | 
In the evening of April 16th, 2010 my emails stopped arriving. Was it a problem with my server, my forwarder, or the client? Having eliminated other possibilities, I knew that the culprit had to be my mail server.
The server was running an old version of Clam AntiVirus - an open source (GPL) anti-virus for Linux / Unix and it reached end of life on April 15th. Once it stopped working on the 16th, the messages were no longer being delivered to recipient mailboxes. Instead they were being queued in postfix with the error message of "451 Local Error (in reply to end of DATA command)." Attempts to restart clamd failed with an EOL message.
I used YaST2 online upgrade facility to download and install the rpm of Clam AntiVirus version 0.95, rebooted the machine (reboot), restarted clamd (/etc/init.d/clamd restart) and flushed the Postfix queue (/usr/sbin/postqueue -c /etc/postfix -f). Queued messages got delivered and now everything is hunky-dory.
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