[IMail Forum] IMail bouncing back E-mail for no stated reason

[Matt]

I'm trying to figure out what is going on with my E-mail bouncing to a 
friend's server.  IMail typically logs a reason, i.e. the error code and 
response, but nothing appears for this one.  The issue is also not 
transient for me when it comes to this one domain, though a test from a 
Web mail provider seems to have gone through or at least didn't bounce 
back yet.  I can also send E-mail to other domains, just not this one.  
Here's my log snippet.

20050301 000309 127.0.0.1       SMTPD (f78d088800a21105) [208.7.179.200] 
connect ***My IP*** port 4218
20050301 000309 127.0.0.1       SMTPD (f78d088800a21105) [***My IP***] 
EHLO [***My HELO***]
20050301 000309 127.0.0.1       SMTPD (f78d088800a21105) Authenticated 
[EMAIL PROTECTED], session treated as local.
20050301 000309 127.0.0.1       SMTPD (f78d088800a21105) [***My IP***] 
MAIL FROM:<[EMAIL PROTECTED]>
20050301 000309 127.0.0.1       SMTPD (f78d088800a21105) [***My IP***] 
RCPT TO:<[EMAIL PROTECTED]>
20050301 000310 127.0.0.1       SMTPD (f78d088800a21105) [***My IP***] 
F:\\Df78d088800a21105.SMD 1366
20050301 000310 127.0.0.1       SMTP (f78d088800a21105) processing 
F:\\Qf78d088800a21105.SMD
20050301 000310 127.0.0.1       SMTP (f78d088800a21105) Creating message 
from Postmaster
20050301 000310 127.0.0.1       SMTP (f78d088800a21105) finished 
F:\\Qf78d088800a21105.SMD status=2

A telnet session to both of the receiving server's MX records works just 
fine (tested up until the DATA command would be sent).  I'm a bit 
stumped as to whether this is my problem or the other server's problem, 
and I would appreciate any insight into what conditions might cause 
IMail to log nothing but return a message (DNS failure maybe).

Thanks,
Matt
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