Re: [Exim] helo_verify

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Author: Exim Users Mailing List
Date:  
To: Weavind, Mike
CC: Exim Users Mailing List
Subject: Re: [Exim] helo_verify
[ On Thursday, November 21, 2002 at 13:32:13 (-0000), EXIM Users wrote: ]
> Subject: [Exim] helo_verify
>
> We currently use exim v3.34 and have tried the helo_verify but it rejects
> mail from servers that put their domain name in the helo command rather than
> their hostname. hotmail is an example.


Yup, because what those servers are doing is flat-out not allowed by any
SMTP-related standard. The greeting name _MUST_ be the principal
hostname for the client. The whole idea is to clearly and uniquely
identify the client _host_, not it's sub-domain. This has been a
fundamental absolute requirement of SMTP for only about 20 years now.

--
                                Greg A. Woods


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