If I use cfmail with the from address being "no-reply@domain1.com" it sends
fine. However, if I change (and only change) the from attribute to
"no-reply@domain2.com" the mail is not sent and ends up in the Undelivr
directory.

The only thing I see in the mailsent.log is "Moved undelivered mail:
Mail47522.cfmail to /opt/coldfusionmx7/Mail/Undelivr directory"

Any clue what could be causing this? It's my understanding that cfmail should
at least attempt to send the e-mail as long as the address is valid - so why
should a different domain be preventing an attempt??

Many thanks,
Marc