Re: changing From in email envelope

Mtr wrote:
On Mon, 01 Oct 2007 22:57:34 -0400, Jerry Stuckle <jstucklex@xxxxxxxxxxxxx>
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@xxxxxxxxxxxxx
==================
.

Relevant Pages

  • Re: changing From in email envelope
    ... Exim (just as there was an Exim way to override what goes into the ... called rDNS, not reverse domain lookup. ... Some MUAs will give the name of any common Windows box in the HELO. ... won't expect a mail agent to lookup those:) ...
    (comp.lang.php)
  • Re: changing From in email envelope
    ... Exim (just as there was an Exim way to override what goes into the ... Many MTA's will validate a server is who it says it is via reverse domain lookup. ... You aren't giving away your account name. ...
    (comp.lang.php)
  • Re: changing From in email envelope
    ... Exim (just as there was an Exim way to override what goes into the ... called rDNS, not reverse domain lookup. ... then do a rdns lookup on it. ... You aren't giving away your account name. ...
    (comp.lang.php)