[Mimedefang] Rejecting e-mails with blank CC: and Reply-To:
brennan at columbia.edu
Wed Apr 11 12:23:34 EDT 2012
> 554 5.7.1 This message has been blocked because the return email domain
> is invalid.(domain name has invalid syntax)
Googled web pages suggest that the problem is a bad envelope sender.
In the case above the domain appears to be a blank. Is the sender
just 'user' instead of 'user at domain.tld'?
It's not a Mimedefang error.
Columbia University Information Technology
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