I am seeing that some email appears in the the intended receivers mail box and some don't.
The ones that don't get delivered to the remote mail server have log entries like this: Mar 18 03:15:02 aoakley postfix/smtp[1714]: 6835847611D: to=<ksome...@domain1.com>, relay=mail1.domain1.com[xxx.xxx.xx.x]:25, delay=0.68, delays=0.06/0.01/0.14/0.47, dsn=2.0.0, status=sent (250 Ok: queued as 1499652CD48) And those that do get delivered have log entries like this: Mar 18 03:15:36 aoakley postfix/smtp[1712]: 6835847611D: to=<esomeb...@domain2.com>, relay=mx.domain2.net[yyy.yyy.yy.y]:25, delay=35, delays=0.06/0.01/0.16/34, dsn=2.0.0, status=sent (250 OK id=f137m907301NGbHLcq564) I can send email successfully to both domains from other postfix served locations without a problem. Running host against the failing domain I get: domain1.com has address xxx.xxx.xx.x domain1.com mail is handled by 0 mail.anotherdomain.net. I don't see any rejections or bounces that would tell me an email failed to get delivered. Is there more logging that I can enable? I am running on CentOS 5.4 with the latest stable version of Postfix compiled to support MySQL. Emmett