[Exim] Reverse DNS lookups

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Author: Michael Jakscht
Date:  
To: exim-users
Subject: [Exim] Reverse DNS lookups

Hi,

it seems that exim 4.12 has not enough time to complete reverse DNS-lookups
and therefore rejects messages with the following error:

========================================
2003-02-27 09:02:44 H=buster.nbg-hannover.de [62.181.135.129]
F=<Mario.Gaertner@???> rejected RCPT
<apanter@???>: reverse host lookup failed
========================================

When I manually do an nslookup on that IP, the system gives me the
following informations:


========================================
mail:/etc/exim # nslookup 62.181.135.129
Server:         213.69.199.238
Address:        213.69.199.238#53


Non-authoritative answer:
129.135.181.62.in-addr.arpa     name = buster.nbg-hannover.de.


Authoritative answers can be found from:
135.181.62.in-addr.arpa nameserver = dns1.nbg-hannover.de.
135.181.62.in-addr.arpa nameserver = dns2.nbg-hannover.de.
dns1.nbg-hannover.de    internet address = 62.181.128.1
dns2.nbg-hannover.de    internet address = 62.181.128.2


mail:/etc/exim #
========================================



So is it possible to "tune" the time exim can spend on an reverse
DNS-lookup to a longer period than the standard time (how long is this by
the way?)

Michael