Re: [Exim] Error from Exchange server

On Fri, 7 Feb 2003, Richard Welty wrote:

[what seems to be the #1 FAQ for illegally-configured servers]

> if you really have to accept this email (changing host names on NT boxen
> can be a bastard of a job) there is a flag to permit _ characters in HELO
> values.

And you'll then be accepting a heap of spammer mail that you could
have avoided.

If you _really_ have to accept this mail (which I don't encourage, but
reality sometimes supervenes) then you're better adding this _one_
domain to an exception list for HELO checks, rather than giving in and
accepting mail from just any crap domain that refuses to conform to
the interworking specification. (IIRC we have just two of them in our
exception list, and the rest get sent off).

From our rejection log, I can assure you that many of these defective
domains are spammers and other kinds of email abuser. It really would
not be a good idea to accept the lot of them without further protest.