From: | Magnus Hagander <magnus(at)hagander(dot)net> |
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To: | "Marc G(dot) Fournier" <scrappy(at)hub(dot)org> |
Cc: | Kevin Hunter <hunteke(at)earlham(dot)edu>, PostgreSQL www <pgsql-www(at)postgresql(dot)org> |
Subject: | Re: email is fast! |
Date: | 2007-02-08 08:29:46 |
Message-ID: | 20070208082946.GA27377@svr2.hagander.net |
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Lists: | pgsql-www |
On Wed, Feb 07, 2007 at 07:01:43PM -0400, Marc G. Fournier wrote:
> >> Just to follow up this one ... Kevin sent me an email including the full
> >> headers for one that took 12 hours to be delivered ... using the QUEUE ID, I
> >> checked the logs and it turns out that the mail server couldn't resolve the
> >> MX the first and second time it tried to deliver, but succeeded on the
> >> third ...
> >
> > This sounds scaringly close to the problem we had on wwwmaster with it
> > not delivering emails. Resolving separately looked fine, but sendmail
> > couldn't resolve.
> > Could it be symptoms of the same problem?
>
> Does postfix do any 'caching of results'? For instance, if it got a failed
> response, would it cache that and re-use that later, pending it timing out in
> its own cache? So try 1 failed, try 2 used cache and failed, try 3 was after
> cache timed out and re-tried, at which point the local DNS server had the right
> value ...
I don't beleive it does. The resolver library might do it though - some do, others don't.
//Magnus
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