> Jun 30 12:21:21 cllxprmgtsmtp01 postfix/smtpd[8837]: timeout after RSET > from unknown[10.84.66.53]
The LYRIS client sent the RSET command, and then it sent no more commands until Postfix timed out (default timeout is 1000s). That could indicate a problem with LYRIS. Wietse