Sendmail and SMTP AUTH

[Rodolfo J. Paiz]

At 10:16 AM 7/9/2004, Kenneth Porter wrote:
>--On Friday, July 09, 2004 6:07 PM +0200 Alexander Dalloz 
><alexander.dalloz at uni-bielefeld.de> wrote:
>
>>>I use define(`SMART_HOST',`[mail.bellsouth.net]') in
>>>sendmail.mc.  This has been working well since long before FC2.
>>
>>Why the Bellsouth SMTP server in squared brackets?
>
>I haven't seen that done in SMART_HOST, but in mailertable the square 
>brackets mean that the host is the actual SMTP host. Without them, 
>sendmail does a DNS lookup on the name looking for an MX record, assuming 
>that the name is an email domain, not a particular host.

So in theory then, when we *know* that a given hostname is the MX record 
for that domain then we can put its name in brackets and save two DNS lookups?

Cheers,


-- 
Rodolfo J. Paiz
rpaiz at simpaticus.com
http://www.simpaticus.com