I got this in log, message to postfix mailing list can not be sent after I changed
relayhost = $mydomain On Wed, Apr 08, 2009 at 08:17:59PM -0500, Zhengquan Zhang wrote: Apr 8 20:17:59 m364d1 postfix/cleanup[2364]: D9AC0B5B57: message-id=<20090409011759.ga2...@m364d1.ece.northwestern.edu> 439 Apr 8 20:17:59 m364d1 postfix/qmgr[4493]: D9AC0B5B57: from=<islanddan...@m364d1.ece.northwestern.edu>, size=1158, nrcpt=1 (queue active) 440 Apr 8 20:17:59 m364d1 postfix/smtp[2366]: warning: relayhost configuration problem 441 Apr 8 20:17:59 m364d1 postfix/smtp[2366]: D9AC0B5B57: to=<postfix-users@postfix.org>, relay=none, delay=0.03, delays=0.02/ 0.01/0/0, dsn=4.3.5, status=deferred (Host or domain name not found. Name service error for name=localdomain type=A: Host not found) Could anybody help me diagnose this? Thanks, -- Zhengquan