On Fri, 02 Jan 2004 17:41:26 EST, you said:
First, the ABNF is wrong given the text and, on behalf of myself
and the several people who checked it, my/our apologies.
A separate issue comes to mind - a number of systems reject the
format mentioned in 126.96.36.199. In particular, Sendmail 8.12.4 included
If AllowBogusHELO is set to false (default) then also complain if
the argument to HELO/EHLO contains white space. Suggested
by Seva Gluschenko of Cronyx Plus.
Such sendmails reject it:
Connected to localhost.
Escape character is '^]'.
220 turing-police.cc.vt.edu ESMTP Sendmail 8.13.0.PreAlpha5/8.13.0.PreAlpha5;
Fri, 2 Jan 2004 18:08:03 -0500
ehlo [127.0.01.1] test.domain.name
501 5.0.0 Invalid domain name
(Which incidentally was how I opened this can of worms to begin with).
Fortunately, at least Sendmail allows retrying with a less-weird EHLO, so
there's a way for future systems to drop back. Unless of course some system
out there gets annoyed at seeing a second EHLO instead of a HELO drop-back.
Isn't backward-combatability fun?
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