Disabling client IP reverse DNS?

Scott Balmos sbalmos at members.simunex.com
Tue Nov 22 16:04:36 EST 2005

Ken Murchison wrote:

> Scott Balmos wrote:
>> Hi all,
>> I know in a virtual domain setup, if a user connects with an 
>> unqualified username, the server does a reverse DNS lookup on the 
>> *server's* incoming connection IP, to determine a default virtual 
>> domain name.
>> But how do I disable Cyrus from doing a reverse DNS on the *client's* 
>> IP that they're connecting from? Connections to my mail server from 
>> home are taking very long because of a reverse DNS lookup being done 
>> on my home IP. This fails because my stupid cable Net ISP doesn't 
>> know how to run DNS properly. :)
> Set the 'virtdomains' option to 'userid' instead of 1/yes/on.
This does not solve the situation. I am not in a virtual domain setup. 
But even with the noted change, the system continues to attempt a 
reverse DNS on the *client* IP.


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