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Re: TINW was RFC2821b is-01 Issue 1: trailing dot in Domain

2007-03-27 12:52:10

On Tue, 27 Mar 2007, Arnt Gulbrandsen wrote:

2. I see quite a few addresses of the form 'localpart(_at_)hostname'. Say 
between
1% and 1ppm of messages.

Yes, I see about 1 per 1000 on my MXs today. About 85% of them are @exe or
@dll so probably an artefact of one particular broken bit of ratware.

If 'localpart(_at_)tld' is guaranteed not to be valid, a smarthost's life is
simpler: 'localpart(_at_)something' is either a local address (not subject to
IETF rules) or invalid.

Private domains are not necessarily single-label, so your suggestion isn't
a general-purpose simplification and in fact probably *adds* complexity:
If your MTA can handle multi-label private domains correctly then it
should be able to handle single-label private domains without any special
cases.

Tony.
-- 
f.a.n.finch   <dot(_at_)dotat(_dot_)at>   http://dotat.at/
SHANNON ROCKALL: NORTH OR NORTHWEST 5 TO 7, OCCASIONALLY GALE 8 IN SHANNON
AT FIRST, DECREASING 4 OR 5, OCCASIONALLY 6 LATER. MODERATE OR ROUGH. RAIN
THEN SHOWERS. GOOD, OCCASIONALLY MODERATE IN EAST AT FIRST.