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Subject: messages return immediatly after a DNS error
From: Kerline DOUCET (kerline.doucetaql.fr)
Date: Fri Dec 15 2000 - 02:16:55 CST

Hi !

We use postfix to relay messages from our intranet.

I noticed unexpected behaviour with our Postfix while dealing with DNS
errors.

Example 1 :
Sometimes DNS servers are temporarily misconfigured.
When a user sends an email to such a domain, he receives
immediatly an error saying :
 <destvalid.domain.com>: Name service error for domain
 valid.domain.com: Host found but no data record of requested type

Example 2 :
Sometimes, the link to a domain is temporarily down.
When a user sends an email to such a domain, he receives
immediatly an error saying :
 <destvalid.domain.com>: Name service error for domain
 valid.domain.com: Host not found

In both cases, there is only a temporarily error with the DNS servers.
We want to configure Postfix so that it keeps trying to send the
email during 5 minutes (for example) before giving up and sending
back a message to the user.

Is there is a way to configure Postfix for that, or do you know
another solution ?

Thanks