[lug] Postfix and M$ smtp question

[rm at fabula.de]

On Wed, Jul 17, 2002 at 10:14:42PM -0600, Egg wrote:
> 
> I am curious if anyone has any idea why requests for mail delivery
> times-out when delivering to the following domains:
> 
> hotmail.com
> msn.com
> pinpointtech.com
> 
> 
> The only thing that I can think of is that they are M$ based and thus
> aren't as likely to cooperate, but I find this a niave assumption to
> make so I was wondering if anyone knows what could be possible
> cause(es).


Hmm, shot into the dark: some providers (esp. the larger ones) start
to get rather picky when it come to accepting mail -- some actually
_do_ require that the sending host (as identified by the 'HELO' header)
does resolve corrctly during a DNS lookup. Assuming that you talk about
the same host that sent your mail:

|  Received: by Shoggoth.only-an-egg.org (Postfix, from userid 1000)
|               ^^^^^^^^^
|         id 0967815064A; Wed, 17 Jul 2002 22:14:43 -0600 (MDT)
|  From: Egg <egg at only-an-egg.org>
| 

my 'nslookup' looks like this:

| > set qtype=any
| > shoggoth.only-an-egg.org.
| Server:  www-proxy.FR1.srv.t-online.de
| Address:  217.5.112.21
| 
| *** www-proxy.FR1.srv.t-online.de can't find shoggoth.only-an-egg.org.: Non-existent host/domain
| > 

so it looks like 'shoggoth' isn't known to the rest of us ...


 Hope this helps


    Ralf Mattes