Disabling client IP reverse DNS?

[Ken Murchison]

Scott Balmos wrote:
> 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.

Sorry, I didn't read closely enough.  I don't believe there is a way to 
disable this without making changes to the source.  Some SASL mechs 
require the IPs, so we do the lookup before authentication.

-- 
Kenneth Murchison
Systems Programmer
Carnegie Mellon University