[Imap-uw] pop3 is very slow to start

[John Kelly]

On Mon, 4 Dec 2006 08:36:09 -0800 (PST), Mark Crispin
<mrc at CAC.Washington.EDU> wrote:

>On Mon, 4 Dec 2006, John Kelly wrote:
>> >-static long allowreversedns = T;/* allow reverse DNS lookup */
>> >+static long allowreversedns = NIL;/* allow reverse DNS lookup */
>
>This should be a last resort, since doing this will break some 
>authentication mechanisms (most notably Kerberos) and make the logs less 
>useful.  I'm not saying "don't do it" (the option is there in case you 
>need to do it) but rather "try everything else first".

The DNS lookup has little cost when you manage the clients' DNS, and
you make sure they all have good DNS.  But for users connecting from
the world, there will be delays.

I need speed, rather than hostnames in the logs.  And Kerberos is not
a concern (for me).