Some people experienced an unexpected problem with the postgrey daemon. After update to a new version the daemon doesn’t start listening. Start scripts returns no errors but a service doesn’t listen on any socket.
Mail.log file contains the following lines:
postfix/smtpd[22013]: warning: connect to 127.0.0.1:60000: Connection refused postfix/smtpd[22013]: warning: problem talking to server 127.0.0.1:60000: Connection refused