[courier-users] Delay before delivering mail

[Bowie B. <Bowie_Bailey@BUC.com>]

I just set up a new Courier-MTA server and came across this issue while
testing.  A message to an external email address will be delivered, but
there is a five minute delay between the server receiving the message
and delivering it to the destination mail server.  I have compared
config files between this server and my operational Courier server and
can find no differences that would cause this.  I'm including a clip
from my log file below:

Mar 24 11:05:24 bnofmail2 courierd: newmsg,id=0013BAF9.4061B1C3.00000560:
dns; bowiespc (softdnserr [::ffff:172.16.17.87])
Mar 24 11:05:24 bnofmail2 courierd:
started,id=0013BAF9.4061B1C3.00000560,from=<te...@bu...>,module=esmtp,host
=yahoo.com,addr=<[deleted]@yahoo.com>
Mar 24 11:05:24 bnofmail2 courierd: Waiting.  shutdown time=none, wakeup
time=none, queuedelivering=1, inprogress=1

[ ... Notice 5 minute delay here ... ]

Mar 24 11:10:49 bnofmail2 courieresmtp:
id=0013BAF9.4061B1C3.00000560,from=<te...@bu...>,addr=<[deleted]@yahoo.com
>: 250 ok dirdel
Mar 24 11:10:49 bnofmail2 courieresmtp:
id=0013BAF9.4061B1C3.00000560,from=<te...@bu...>,addr=<[deleted]@yahoo.com
>,size=1354,success: delivered: mx1.mail.yahoo.com [67.28.114.33]
Mar 24 11:10:49 bnofmail2 courieresmtp:
id=0013BAF9.4061B1C3.00000560,from=<te...@bu...>,addr=<[deleted]@yahoo.com
>,size=1354,status: success
Mar 24 11:10:49 bnofmail2 courierd: completed,id=0013BAF9.4061B1C3.00000560

What could be causing this?  This server is currently doing nothing but
delivering the occasional test message.

Thanks,
Bowie