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Posted by Jerry Stuckle on 10/02/07 10:42
Mtr wrote:
> On Mon, 01 Oct 2007 22:57:34 -0400, Jerry Stuckle <jstucklex@attglobal.net>
> wrote:
>
>>> However, is there a PHP way to override the HELO/EHLO hostname that calls
>>> Exim (just as there was an Exim way to override what goes into the
>>> envelope's From).?
>>>
>> No. And you don't want to. Many MTA's will validate a server is who it
>> says it is via reverse domain lookup.
>
> Hardly true, the name given on HELO is not used much anymore. And it is
> called rDNS, not reverse domain lookup.
>
Actually, quite incorrect. Many sites validate the HELO name - first
for syntax, then do a rdns lookup on it. MTA's on all of the Linux
sites I manage do it, as do many other people I know. You should check
the MTA newsgroups.
Also, it is called both rdns and reverse domain name lookup - and has
been for over 30 years.
> You might be thinking of how a server will do a lookup on the domain that
> is given in the FROM. That is different.
>
No, I'm not thinking of that at all.
> Some MUAs will give the name of any common Windows box in the HELO. We
> won't expect a mail agent to lookup those :)
>
I'm not talking about MUA's.
>> And they will bounce (or just
>> delete) any mail from mismatched names.
>
> Yes, I do. Because I don't want to give away my account name with every
> email. Besides, I am calling Exim - I am not connecting via TCP socket, as
> is obvious from my post. But thanks anyway.
You aren't giving away your account name. Exim is providing your
computer (host) name.
And it doesn't matter if you're calling Exim or not (yes, I use Exim on
all of the Linux systems I manage). This is a configuration parameter
in Exim, not a user-defined parameter. As it should be, according to
the RFC's.
I suggest you follow this up on the Exim mailing list. You'll be told
the same thing - for the same reasons.
--
==================
Remove the "x" from my email address
Jerry Stuckle
JDS Computer Training Corp.
jstucklex@attglobal.net
==================
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