Jordan, thanks for your reply

El mié, 16-04-2008 a las 19:58 +0000, jordan escribió:
> David Ballester <[EMAIL PROTECTED]> writes:
> 
> > 
> > Best regards
> > 
> 
> I have multiple virtual email domains behind the efw with no problems. 
> 
> What I did was have all mail servers using efw as a smarthost and routing out
> the incoming interface.  I created a PTR record for the EFW HELO hostname and
> SPF records for the domains behind and my mail is delivered everywhere. 
> 
> If EFW has a HELO of say helo.yourmail.dom then you need a corresponding mx/a
> record matching a PTR record that reverses to your main external interface IP 
> or
> whichever IP mail flows from. 
> 

Yes, that's what I had in mind, the problem is that I've no access to
some of the domain dns registers. We control some virtual domains info,
other domains are out of our control.

> If you do as above then all recipient mail servers will see the EFW as the
> delivery host and accept the mail regardless of the virtual host sending the
> mail from behind it. 
> 
> Make sure you create SPF records for all virtual hosts behind efw if the 
> domains
> are different so that recipeints know that recipient servers checking SPF know
> that mail from othermail.otherdomain.dom is allowed to be sent from
> helo.yourmail.dom. 
> 

I must verify something but iirc, all virtual domains on one mailserver
are under our control, at least I could apply the ptr/spf solutions at
least for this mailserver.

Thanks for sharing

Best regards

D.


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