Re: [gentoo-user] Anyone using Yahoo as Postfix relay? (Name service error for name=smtp1.mail.vip.ukl.yahoo.com type=MX: Malformed name server reply)

[Enrico Weigelt <weigelt@metux.de>]

* Stroller <stroller@stellar.eclipse.co.uk> wrote:

Hi,

> >
> >maybe he only accepts only authenticated users to relay ?
> 
> There's a link on the webpage which explains the reason - apparently  
> they would only accept messages with a From: address like  
> user@stroller.uk.eu.org from my host. Anything which I've addressed  
> from@yahoo.com has to reach them via yahoo.com's servers.


Yeah, one server is for relaying traffic with @... *sender*, and 
another is for incoming traffic *to the @yahoo.com domain.
They're separate, one doesn't accept the stuff for another.

<snip>

> >Doesn't postfix have some feature like sendmail's mailertable ?
> 
> Yes. On Googling "mailertable" I am able to tell you that this  
> appears to be exactly the same as /etc/postfix/transport
> 
> So:
>   $ cat /etc/postfix/transport
>   lsv.uky.edu     :smtp.mail.yahoo.co.uk
> tells my server that anything going to lsv.uky.edu should relay via  
> my outgoing SMTP account at smtp.mail.yahoo.co.uk. This is a _little_  
> clumsy for my purposes, but adequate.

hmm, looks okay for now. 
Did you authenticate propery @smtp.mail.yahoo.co.uk ?

<snip>

> >yeah, postfix gets confused by the "." MX reference for the domain
> >smtp1.mail.vip.ukl.yahoo.com. Although it is an unclean configuration,
> >I do not see what this has to do with your relay ... your postfix
> >just has to pull its mails (for yahoo.co.uk) to smtp.mail.yahoo.co.uk,
> >and it has an proper A record, so what does it need the MX record  
> >for ?
> 
> Ah, looking up <http://www.mob.net/~ted/tools/mx.php3? 
> domain=smtp.mail.yahoo.co.uk> I see what you mean.
> 
> I don't see why postfix is looking up the MX record for it, either.  :(

Maybe he's paranoid ?

> My immediate reaction is: what if I host a fake MX record for  
> smtp.mail.yahoo.co.uk on my internal DNS? I'm not sure of the  
> implications of that.

hmm, you could hava a try.
 
> >BTW: if you don't get it fixed, you may get an UUCP account for
> >relay at my site.
> 
> I think this would only satisfy mg1.uky.edu if you yourself relayed  
> anything to its domain via Yahoo. And for that you would require an  
> SMTP account with Yahoo.

My relays push the mails to the MX'es defined in the domains.
Maybe I missed the point, but I don't see why this shouldn't work.


cu
-- 
---------------------------------------------------------------------
 Enrico Weigelt    ==   metux IT service

  phone:     +49 36207 519931         www:       http://www.metux.de/
  fax:       +49 36207 519932         email:     contact@metux.de
  cellphone: +49 174 7066481
---------------------------------------------------------------------
-- 
gentoo-user@gentoo.org mailing list