Re: [Exim] Unroutable Mail Domain Problem/Possible DNS issue…

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Autor: Philip Hazel
Fecha:  
A: Justin Bloom
Cc: exim-users
Asunto: Re: [Exim] Unroutable Mail Domain Problem/Possible DNS issue?
On Tue, 7 May 2002, Justin Bloom wrote:

> The problem occurs with multiple different servers so it is not just with
> communication with a single server. What I have noticed is that if the
> message is sent again it successfully manages to reach the target system. I
> believe that the cause of the problem maybe that the DNS is taking to long
> to be retrieved by the mail server and that exim is rejecting it as it times
> out before the DNS query is answered as it also appears to be a problem only


Exim just calls your DNS resolver. Most resolvers give "try again" if a
query times out. This will cause Exim to defer delivery.

> My question is can I extend the time that exim waits for a DNS query to be
> returned or get it to retry a few times before bouncing the message back to
> the user who the message originated from?


Exim should normally retry according to its retry rules.

Exim has two options calls dns_retry and dns_retrans that set resolver
options.


--
Philip Hazel            University of Cambridge Computing Service,
ph10@???      Cambridge, England. Phone: +44 1223 334714.