Re: [taugh.com-standards] Re: Gen-ART and OPS-Dir review of draft-ietf-appsawg-nullmx-06
John C Klensin <john-ietf@jck.com> Tue, 02 September 2014 18:51 UTC
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Date: Tue, 02 Sep 2014 14:51:08 -0400
From: John C Klensin <john-ietf@jck.com>
To: John R Levine <johnl@taugh.com>, Viktor Dukhovni <ietf-dane@dukhovni.org>
Subject: Re: [taugh.com-standards] Re: Gen-ART and OPS-Dir review of draft-ietf-appsawg-nullmx-06
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--On Tuesday, September 02, 2014 14:30 -0400 John R Levine <johnl@taugh.com> wrote: >> Sadly, though it is very late in the process, I failed to >> notice this originally, and must belatedly report a >> significant issue noted by Wietse Venema. The response code >> for rejecting a recipient with a nullmx domain and a sender >> with a nullmx domain are reversed in the draft. >> >> Since 521 like 221 and 421 leads to connection drop after the >> reply, > > Only when it's the SMTP greeting. In this case it's not. > That suggests that JCK's suggestion to have a new RFC to > replace 1846 is a good one, since it could mention this other > fairly obvious use case. See draft-klensin-smtp-521code. If additional text is needed there, please suggest some. >> it is only appropriate when the entire envelope will be >> rejected. Thus 521 goes with rejection of a nullmx sender >> domain and 550 with a particular nullmx recipient. > > No, 550 to reject the MAIL FROM is correct. See RFC 5321, sec > 3.3. It's a policy rejection. Yes, or 554, see Section 3 of draft-klensin-smtp-521code for discussion (and, if I got that wrong, this would be a good time to discuss it). john
- Gen-ART and OPS-Dir review of draft-ietf-appsawg-… Black, David
- Re: Gen-ART and OPS-Dir review of draft-ietf-apps… Viktor Dukhovni
- Re: Gen-ART and OPS-Dir review of draft-ietf-apps… Viktor Dukhovni
- Re: [taugh.com-standards] Re: Gen-ART and OPS-Dir… John R Levine
- Re: [taugh.com-standards] Re: Gen-ART and OPS-Dir… Viktor Dukhovni
- Re: [taugh.com-standards] Re: Gen-ART and OPS-Dir… John C Klensin
- SMTP 521 code Viktor Dukhovni
- Re: SMTP 521 code John C Klensin
- Re: [taugh.com-standards] Re: Gen-ART and OPS-Dir… John R Levine
- Re: [taugh.com-standards] Re: Gen-ART and OPS-Dir… Viktor Dukhovni
- Re: [taugh.com-standards] Re: Gen-ART and OPS-Dir… ned+ietf
- Re: [taugh.com-standards] Re: Gen-ART and OPS-Dir… John Levine
- Re: [taugh.com-standards] Re: Gen-ART and OPS-Dir… Wietse Venema
- Re: [taugh.com-standards] Re: Gen-ART and OPS-Dir… Wietse Venema
- Re: [taugh.com-standards] Re: Gen-ART and OPS-Dir… ned+ietf