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]"
There was a specification which was published 18 years ago . 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?
1. Whether the IETF is able adhere to its standards is a different matter.
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