Re: [EXIM] HELO verification

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Author: Philip Hazel
Date:  
To: Andreas M. Kirchwitz
CC: exim-users
Subject: Re: [EXIM] HELO verification
On Wed, 28 Apr 1999, Andreas M. Kirchwitz wrote:

> Exim runs as daemon and I want it to accept mail only if the
> dialog starts with HELO (EHLO). Some additional syntax checks
> would be nice. But I don't want it to check if the given
> hostname actually matches the IP address of the calling party.


That is an unusual requirement. Mostly, people either want the HELO
completely verified, or they don't care about HELO at all. I don't see
any benefit from insisting on HELO and not checking it.

> Without "helo_verify" Exim doesn't seem to require HELO at all.


Correct.

> What does "helo_accept_junk_nets" do?


It permits *syntactic* junk in the HELO command, which would otherwise
get rejected. This happens before helo_verify kicks in.

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



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