On Mar 30, 2021, at 10:22 PM, John C Klensin <john-ietf(_at_)jck(_dot_)com>
wrote:
Not speaking for John, but the point I was trying to make is
that, if anyone is offering support for non-ASCII addresses
and/or header fields, 8BITMIME (and advertising it) is already a
MUST. And, if anyone is not offering support for non-ASCII
addresses and header fields and is trying to appeal to, or
interact with, a diverse international audience, it is probably
time to get with the program... or expect to be called upon to
explain why not (if not already, then soon).
I take no issue with that. Just observing that whether it is MUST
or not is mostly moot, unless we're also deprecating 7-bit downgrade.
$ posttls-finger dukhovni.org
posttls-finger: Connected to smtp.dukhovni.org[100.2.39.101]:25
posttls-finger: < 220 straasha.imrryr.org ESMTP Postfix
posttls-finger: > EHLO straasha.imrryr.org
posttls-finger: < 250-straasha.imrryr.org
posttls-finger: < 250-PIPELINING
posttls-finger: < 250-SIZE 157286400
posttls-finger: < 250-VRFY
posttls-finger: < 250-ETRN
posttls-finger: < 250-STARTTLS
posttls-finger: < 250-ENHANCEDSTATUSCODES
posttls-finger: < 250-8BITMIME
posttls-finger: < 250-SMTPUTF8
posttls-finger: < 250 CHUNKING
posttls-finger: > STARTTLS
posttls-finger: < 220 2.0.0 Ready to start TLS
posttls-finger: smtp.dukhovni.org[100.2.39.101]:25: Matched DANE EE certificate
at depth 0: 3 1 1
DB950F0E0030900B7E5F29FB80D843268985F386D1915EE2000D527B5F369C17
posttls-finger: smtp.dukhovni.org[100.2.39.101]:25:
subject_CN=mournblade.imrryr.org, issuer_CN=R3,
fingerprint=7D:01:E9:7D:3F:AF:25:C2:99:51:16:93:67:B1:6E:FE:AA:23:0E:43:E3:C3:17:7A:5A:B5:2B:50:E1:63:5D:E4,
pkey_fingerprint=DB:95:0F:0E:00:30:90:0B:7E:5F:29:FB:80:D8:43:26:89:85:F3:86:D1:91:5E:E2:00:0D:52:7B:5F:36:9C:17
posttls-finger: Verified TLS connection established to
smtp.dukhovni.org[100.2.39.101]:25: TLSv1.3 with cipher TLS_AES_256_GCM_SHA384
(256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)
server-digest SHA256
posttls-finger: > EHLO straasha.imrryr.org
posttls-finger: < 250-straasha.imrryr.org
posttls-finger: < 250-PIPELINING
posttls-finger: < 250-SIZE 157286400
posttls-finger: < 250-VRFY
posttls-finger: < 250-ETRN
posttls-finger: < 250-ENHANCEDSTATUSCODES
posttls-finger: < 250-8BITMIME
posttls-finger: < 250-SMTPUTF8
posttls-finger: < 250 CHUNKING
posttls-finger: > QUIT
posttls-finger: < 221 2.0.0 Bye
--
Viktor.
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