--On 1 November 2006 23:42:43 -0800 Greg Wiley <[EMAIL PROTECTED]> wrote:

> 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

We don't allow those folks to send mail. Last complaint was a few years 
ago, we advised them how to fix the problem, and I presume they did.



-- 
Ian Eiloart
IT Services, University of Sussex

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