Re: [exim] Rules for HELO

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Szerző: Greg Wiley
Dátum:  
Címzett: exim users
Tárgy: Re: [exim] Rules for HELO
Marc Perkel wrote:
> What are the rules for HELO?


One thing that bit us a couple of years
ago was checking for strict domain
format compliance. Some Exchange boxes
will include a "_" in their HELO's. I
think it's because Exchange uses the
Windows computer name in a HELO. Under-
scores are perfectly legal characters for
Windows host names but not for DNS
domains. So we add:

helo_allow_chars = _

to allow connections from those folks.

-dub