On Tue, Mar 13, 2001 at 06:57:17PM -0800, Eric Pretorious wrote:
> Is there a method to verify that the "From:" field contains a working
> address before accepting the message? (I've heard of this approach
> somewhere...)
It's a verification of the envelope sender domain (it there is a A or MX
record). You cannot verify the username on the fly, though ...
The code for that is part of e.g. the SPAMCONTROL modifications for
qmail-smtpd:
http://www.fehcom.de/qmail/qmail_en.html
\Maex
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