Re: [Exim] helo_accept_chars and a new feature?

>From: Philip Hazel <ph10@???>
>Reply-To: exim-users@???
>To: Joe Lewis <joe@???>
>cc: exim-users@???
>Subject: Re: [Exim] helo_accept_chars and a new feature?
>Date: Wed, 23 Jul 2003 10:07:25 +0100 (BST)
>
>On Tue, 22 Jul 2003, Joe Lewis wrote:
>
>> I was wondering if we could get a new "feature" in Exim. We have
>> the ability to accept hostnames with underscores in them, but I
>> would like to either warn or deny the messages containing these
>> underscores. My intent is to automate a bounce message that says
>> "Get your mail server fixed".
>
>This is trivially done by an appropriate test on $sender_helo_name
>in an ACL.

And was also a topic discussed recently on this list. Search the
mailing list archives for the thread started by Richard Hall and see
how he does this. Look for:

From: "Richard.Hall" <richard.hall@???>
To: exim-users@???
Subject: [Exim] Exchange, HELO and underscores
Date: Thu, 26 Jun 2003 17:49:34 +0100 (BST)

as your starting point.