[Mimedefang] Testing HELO

[Joseph Brennan]

> Interesting. :) I have just been experimenting with a Milter that rejects
> mail with a HELO greeting of my own IP address! You'd be surprised how
> much that happens. Then I bounce em, like so:
>
> "reject=550 5.7.1 You pretended to be me! [218.37.110.11]"


We have been doing that for a long time, so I am not surprised.
It's a very reliable test.

(Mail from certain PC clients may do this though... we exclude
the test for mail sent with smtp authentication.)

Joseph Brennan         Columbia University in the City of New York
Academic Technologies Group                   brennan at columbia.edu