On 12/1/19 5:21 PM, Valdis Klētnieks wrote:
So basically it's just an implementation bug.
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?
p.s. I do agree that it's important that SMTP implementations permit IP
addresses in HELO/EHLO. An SMTP server is free to reject content
based on server policy, but not to complain about syntax errors that
don't actually exist. In other news, I keep wanting to write an I-D
(and see if I can get it published) entitled "DNS Is Not, And Cannot Be,
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