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

2019-12-15 11:26:21
Hi Alessandro,
At 03:42 AM 15-12-2019, Alessandro Vesely wrote:
I don't know how good a tactic it is to reject address literals. Its rationale
makes little sense.  How about a response like this:

550 5.7.1 <[A.B.C.D]> Please write "foo.example" instead of "[A.B.C.D]"

Too tutorial?


There was a specification which was published 18 years ago [1]. It was recommended to use four small decimal integers separated by dots and enclosed by brackets if the host is not known to the domain name system and communication is blocked. Is there any information to show that the recommendation was followed?

S. Moonesamy

1. Whether the IETF is able adhere to its standards is a different matter.
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