I have my mail server (Exchange) here in the office. It is multihomed (2 NICs). One internal IP and the other the exteral IP associated with mail.craigasmith.com (209.168.148.126)
Outgoing mail does not seem to be a problem. MOST incoming mail works as well, but there are some outside mail servers that are just not getting mail into my server (Comcast is the one I can easily test as I have it at home, but others exist based on feedback from our clients).
I've run the open relay test to see if that fails and it doesn't. I telneted and sent a message from home (comcast). The first try failed. The second try went through, but subsequet attempts from Outlook get returned with this:
Reporting-MTA: dns; QMTA08.westchester.pa.mail.comcast.net [76.96.62.80]
Received-From-MTA: dns; OMTA09.westchester.pa.mail.comcast.net [76.96.62.20]
Arrival-Date: Thu, 04 Sep 2008 13:22:30 +0000
Final-recipient: rfc822; bdc@craigasmith.com
Action: failed
Status: 5.1.1
Diagnostic-Code: smtp; 550 5.7.1 Requested action not taken: message refused
Last-attempt-Date: Thu, 04 Sep 2008 13:22:33 +0000
here is the successful telnet:
220 craigasmith.com Microsoft ESMTP MAIL Service, Version: 6.0.3790.3959 ready a
t Thu, 4 Sep 2008 09:34:38 -0400
helo comcast.net
250 craigasmith.com Hello [76.108.240.128]
mail from: <bcontento@comcast.net>
250 2.1.0 bcontento@comcast.net....Sender OK
rcpt to: <bdc@craigasmith.com>
250 2.1.5 bdc@craigasmith.com
data
354 Start mail input; end with <CRLF>.<CRLF>
subject: test message
this is a test
.
250 2.6.0 <SERVER5axEqh2MJBeHg000009c8@craigasmith.com> Queued mail for delivery
quit
221 2.0.0 craigasmith.com Service closing transmission channel
I'm stuck. any help is greatly appreciated!!