slow smtp connections from LAN (solved)

[Don Russell]

About two months ago I posted a message about slow responses from my 
SMTP server when connecting from within my LAN...  Ref: 
https://www.redhat.com/archives/fedora-list/2006-April/msg00677.html

In case others run into a similar situation, I solved it by running 
named on the same machine with SMTP (sendmail) and configuring the dns 
info for the reverse lookups of my private LAN address range. Then of 
course making the local machine act as the dns server for itself.

Now sendmail is working properly... well, it was working properly, but 
now that nasty delay is gone. :-)

Some references I found useful:
http://sendmail.org/tips/private-dns/