Re: [Exim] 3.x host_lookup failing?

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Auteur: Philip Hazel
Date:  
À: Adam Henry
CC: exim-users
Sujet: Re: [Exim] 3.x host_lookup failing?
On Thu, 24 Oct 2002, Adam Henry wrote:

> Thanks, I understand now. So the host_lookup option is only to give
> information about the reverse DNS entry of sender IP addresses, not to
> deny at all. Even if host_lookup is unset, if there are host names in
> the host_reject variable, delivery will fail if the reverse lookup of
> those names fail.


Exim uses reverse lookup for wildcard host names. For complete names, it
uses forward lookup.

> Does 3.x have the ability to offer this
> functionality, or is this something that only 4.x's ACLs offer?


3.x has +allow_unknown

> I also would like to make sure I am not breaking any RFC by doing this.
> I will check over the relevant ones to see what they say.


RFCs say nothing about policy. That's up to you.

Philip

--
Philip Hazel            University of Cambridge Computing Service,
ph10@???      Cambridge, England. Phone: +44 1223 334714.