Re: [ietf-smtp] [dispatch] Forced SMTP redirects
Viktor Dukhovni <ietf-dane@dukhovni.org> Tue, 16 March 2021 19:52 UTC
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From: Viktor Dukhovni <ietf-dane@dukhovni.org>
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Date: Tue, 16 Mar 2021 17:52:09 -0200
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References: <CAKFo7wkawgk-Yj676kE5MqK8XuebuArMexH-eOdq_Uo7ijdimQ@mail.gmail.com> <20200710015947.0BE2D1C78A2F@ary.qy> <CAKFo7w=MJBt0FdnCcOZCXZWdkd6Jinv4TqwdpefdoaCncbZH3Q@mail.gmail.com> <6AEA7D44C8037B32BC1F3810@PSB> <81d0132b-3ebf-2b0b-756b-503bb5afdb37@dcrocker.net> <8E2D8138-EE61-486A-B957-A922F0C6F4B3@dukhovni.org> <5f803eb4-0fd1-9b15-8d3c-5c5be8ebd063@dcrocker.net>
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Subject: Re: [ietf-smtp] [dispatch] Forced SMTP redirects
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> On Mar 16, 2021, at 5:32 PM, Dave Crocker <dhc@dcrocker.net> wrote: > > That's nice, but you won't be surprised to hear that there are other > implementations that /do/ pay attention to more than the first digit. Sure, but I worry that these are somewhat brittle, because with all the manual anti-spam measures that users tweak into the rulesets of production MTAs via lookup tables and milters, where the user gets to specify the 4XX or 5XX response code, it is much to optimistic to expect them to get these right. Were the (XX) in 4XX or 5XX in response to the usual MAIL transaction commands (MAIL, RCPT, DATA, BDAT, ".") to actually matter, it would be liable to get confused by all manner of misleading signals. The non-transaction commands (AUTH, STARTTLS, ...) tend to see less random meddling from milters. -- Viktor.
- [ietf-smtp] Fwd: [dispatch] Forced SMTP redirects E Sam
- Re: [ietf-smtp] Fwd: [dispatch] Forced SMTP redir… John C Klensin
- Re: [ietf-smtp] Fwd: [dispatch] Forced SMTP redir… John Levine
- Re: [ietf-smtp] Fwd: [dispatch] Forced SMTP redir… John C Klensin
- Re: [ietf-smtp] Fwd: [dispatch] Forced SMTP redir… E Sam
- Re: [ietf-smtp] Fwd: [dispatch] Forced SMTP redir… John R Levine
- Re: [ietf-smtp] Fwd: [dispatch] Forced SMTP redir… John Levine
- Re: [ietf-smtp] Fwd: [dispatch] Forced SMTP redir… Dave Crocker
- Re: [ietf-smtp] [dispatch] Forced SMTP redirects Viktor Dukhovni
- Re: [ietf-smtp] [dispatch] Forced SMTP redirects Dave Crocker
- Re: [ietf-smtp] [dispatch] Forced SMTP redirects Viktor Dukhovni
- Re: [ietf-smtp] [dispatch] Forced SMTP redirects Dave Crocker
- Re: [ietf-smtp] [dispatch] Forced SMTP redirects Viktor Dukhovni
- Re: [ietf-smtp] [dispatch] Forced SMTP redirects Sam Varshavchik
- Re: [ietf-smtp] [dispatch] Forced SMTP redirects Viktor Dukhovni
- Re: [ietf-smtp] [dispatch] Forced SMTP redirects John Levine
- Re: [ietf-smtp] [dispatch] Forced SMTP redirects Arnt Gulbrandsen
- Re: [ietf-smtp] [dispatch] Forced SMTP redirects John C Klensin
- Re: [ietf-smtp] [dispatch] Forced SMTP redirects Paul Smith
- Re: [ietf-smtp] [ dispatch] Forced SMTP redirects Laura Atkins
- Re: [ietf-smtp] [dispatch] Forced SMTP redirects Sam Varshavchik
- Re: [ietf-smtp] [ dispatch] Forced SMTP redirects Viktor Dukhovni
- Re: [ietf-smtp] [ dispatch] Forced SMTP redirects Laura Atkins
- Re: [ietf-smtp] [ dispatch] Forced SMTP redirects Ned Freed
- Re: [ietf-smtp] [ dispatch] Forced SMTP redirects Ned Freed
- Re: [ietf-smtp] [ dispatch] Forced SMTP redirects Laura Atkins
- Re: [ietf-smtp] [dispatch] Forced SMTP redirects Ned Freed