Hi Larsneo,

> I've to admit that I've no idea about those RFC and their benefits, just
wanted to report the issue...

Ah, RFCs. These come in three main categories: -

1       Standards. Some RFCs have the status of a "standard", e.g. RFC2822
(2001, which makes the 1982 RFC822 obsolete. RFC822 is/was STD0011) is a
"Proposed Standard". It's "proposed", because it hasn't yet (6 years later!)
made it all the way through the standards process. You _MUST_ obey the
standards. They are what make the Internet work. Anyone operating a real
world server, like an MTA, is well advised to read all the Standards RFCs.
2       Jokes. Read these if you're bored and easily amused. Please do _NOT_
comply with them ;-)
3       The rest. Generally useful. If you're involved in the particular
area covered by one of these RFCs, then you're strongly advised to comply.

There are subcategories, like draft RFCs, etc. Note that one RFC can replace
another, with a new number, making the previous one obsolete. They also get
updated by later RFCs, to confuse the issue further. See
http://www.ietf.org/iesg/1rfc_index.txt for an index, that shows the status
of each one.

As to your query about domain literals. RFC822 says this, in section 6.2.3:
-

        Note:  THE USE OF DOMAIN-LITERALS IS STRONGLY DISCOURAGED.  It
               is  permitted  only  as  a means of bypassing temporary
               system limitations, such as name tables which  are  not
               complete.

So, not even RFC822 says that they're a good idea!

In the real world, while many MTA systems will accept a domain literal (i.e.
a dotted quad IP address in [square brackets]), these are never needed. This
requirement dates from before DNS was around (RFC1034 /RFC1035, 1987) and
was intended to deal with the situation where your local Hosts table hadn't
been updated yet. That used to happen once a week, on a Wednesday, I
believe.

I've only seen domain literals used in two circumstances: -

1       By spammers
2       By spam testing probes

As Kevin and Marrco said, don't worry about it.

HTH.


Kind regards,

William Stucke
ZAnet Internet Services (Pty) Ltd
[EMAIL PROTECTED]     http://www.zanet.co.za
083-308-0700 - WFS      011-460-0115 - Office     086-502-9444 - Fax



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