Re: [ietf-smtp] ietf.org SMTP server "RFC2821 Violation" for EHLO ip-lit

On Sun, 01 Dec 2019 17:33:29 -0500, Keith Moore said:

> > Unfortunately, it looks to me like a "brown M&M at a Van Halen concert"
> > sort of bug.
> In the sense that if the implementation couldn't get that detail right, 
> they probably botched up a lot more than that?
Exactly. 

550 5.7.1 <[A.B.C.D]>: Helo command rejected: RFC2821 violation

The relevant Received: lines indicate that ietf.org is using Postfix. The good
news is that the problem is *probably* just a bad regexp in one of the local
config files, as some googling doesn't find anybody else tripping over this,
which would be expected for something used as much as Postfix.

(Am placing bets that somebody was trying to prevent <127.0.0.1> literals
and forgot to allow it with brackets)

And something that will warm some hearts: 
http://www.postfix.org/postconf..5.html
makes numerous references to RFC5321 and RFC5322 :)

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