[AusNOG] bigpond mail problems?

[paul+ausnog at oxygennetworks.com.au]

Anybody know if there are any updates on this one ? we have a customer who has their smart host set to mail.bigpond.com and it's getting timeouts, but I can't find any documented issue anywhere on a fault, changing to deliver directly resolves the issue straight away, except for emails to bigpond :-)

Regards
Paul

-----Original Message-----
From: AusNOG [mailto:ausnog-bounces at lists.ausnog.net] On Behalf Of Phil Memery
Sent: Monday, 7 November 2016 11:17 AM
To: Karl Auer
Cc: ausnog at lists.ausnog.net
Subject: Re: [AusNOG] bigpond mail problems?

Hmmm the very same circle of pain as the one I have.

The PBL list stuff was noticeable after I dropped smtp.telstrabusiness.com from the postfix config.

----- Original Message -----
From: Karl Auer <kauer at biplane.com.au>
To: ausnog at lists.ausnog.net
Sent: Mon, 07 Nov 2016 11:01:50 +1100 (EST)
Subject: Re: [AusNOG] bigpond mail problems?

On Mon, 2016-11-07 at 10:44 +1100, Ross Wheeler wrote:
> Since sunday morning, my mailque has a significant number of messages 
> sitting, waiting...  every one of them to bigpond.
> 
> Logs say:
> 
>     Name server: extmail.bigpond.com.: host name lookup failure

I have a client using smtp.telstrabusiness.com as a smarthost - and he's seeing "451 4.4.0 DNS Query failure" in his Exchange server logs.
The server itself can resolve that address, though, so it's a bit of a mystery.

My temporary solution was to switch the send connector config from smarthost delivery to direct delivery via MX. Changing the various DNS configurations (external DNS, hardcoded DNS etc) did not work. I have not yet tried putting the IP address of the smarthost in place of the name, that would probably work too.

Short of calling Telstra and hoping, I'm not sure I can do much else.

Regards, K.