Originally Posted by Toucan
How did you know that was the issue? Was it just the lack of service for amavisd from the netstat command?
It was the error of the message in the mailqueue:
connect to 127.0.0.1[127.0.0.1]:10024: Connection refused
The normal email port is 25, but the error occured on port 10024, which is the port of the amavisd daemon.