sendmail questions about deferred messages

[Paul Howarth]

Ambrogio wrote:
> Il giorno dom, 04/06/2006 alle 18.59 -0400, Tony Nelson ha scritto:
>> At 8:39 PM +0200 6/4/06, Ambrogio wrote:
>>  ...
>>> I seen that if I send the same messages 100 times, the system is
>>> querying dns for the same MX 100 times.
>> Set up a local DNS caching server?  (I know /nothing/.  And maybe you
>> already have one; are the queries slow?)
> This is my idea for today.
> But I don't understand why those queries when the delivery will be local

Sendmail needs to do DNS lookups to canonicalize the address before it 
can determine whether the address is local or not.

Paul.