From: Stephen Carter (stephenretnet.co.uk)
Date: Sun Oct 02 2005 - 09:57:11 CDT

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>>>Jorey Bump <listjoreybump.com> 10/02/05 1:58 pm >>>
>For the same reason: To prevent an MX lookup on the provided string. In
>the case of an IP address, it will fail.

Thanks, sometimes it just takes another way of explaining it. So while
I saw an IP address and host/domain name as separate in the sense of
what they are, postfix sees them all as just 'strings', and that is how
they are treated.

Square brackets are in. I use an IP address so I assume the dns lookups
occured, failed, then postfix just send e-mail to the IP. So the downside
with not using brackets is the extra unnecessary dns lookups, as it was
working without them also.

SteveC

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