I dont know if it may help you or not but once I hv this trouble too
1. when my local network infected with virus which also slowdown my network
2. miss configure networking device (router, switch and cable).. someone
put RJ45 cable loopback again to the switch X-|
3. enabled IPv6 on my emailserver while no other networking device using
it. (Client PC and DNS server dont have the feature)
4. my pop3 concurrency limits to low.
5. and perhaps as they say your mailsvr connection to dns svr could be
problem
try to "telnel localhost 110" from your own mailserver
> It is before the greeting.
> I see when i remote ssh into the box from another computer it is taking
> some time to get logged in.
>
> I am doing a little bit of tcpdumping to see if i can figure whats wrong.
>
> I have tried everything you mention i think, i will double check.
>
> Thanks for your ideas/comments
>
> On Mon, April 30, 2007 23:16, Joseph Lundgren wrote:
>> Ole,
>>
>> Where does the stall occur? Before the server sends its greeting, or
>> afterwards?
>>
>> If the stall happens before the server sends its greeting, your problem
>> is likely to be DNS. The server attempts to perform a reverse DNS
>> lookup on the IP address you are connecting from. If your DNS is
>> misconfigured, it will cause this step to go (VERY) slowly.
>>
>>
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