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Re: SMART_HOST to port 465 or 587?

From John Levine <johnl@taugh.com>
Newsgroups comp.mail.sendmail
Subject Re: SMART_HOST to port 465 or 587?
Date 2026-04-14 00:15 +0000
Organization Taughannock Networks
Message-ID <10rk0ua$2o7t$1@gal.iecc.com> (permalink)
References <10rjcjs$23i1$1@gal.iecc.com> <10rjj1u$3j7e1$1@dont-email.me> <10rjmbc$lpm$1@gal.iecc.com> <2960bm-08v2.ln1@EINTR.net>

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According to Hugo Villeneuve-Lapointe  <hugo_villap@email.invalid>:
>John Levine <johnl@taugh.com> wrote:
>> It appears that Kalevi Kolttonen <kalevi@kolttonen.fi> said:
>>>John Levine <johnl@taugh.com> wrote:
>>>> Thanks, that should do it.  Just out of curiosity is
>>>> there a way to tell it to do immediate TLS on port 465?
>>>
>>>I have no idea as I have never used port 465. I suppose
>>>it is deprecated anyway, but I am not 100% sure.
>> 
>> It's not deprecated at all.  Every MTA I know supports it.  Even sendmail.
>
>How does sendmail supports it?
>
>I know there is Flag=s in DaemonPortOptions to open a port and offer
>SMTP over SSL.

That's it.  Ports 465 and 587 are for submission, from an MUA to an MSA.

In my application the old server is the submission cient and the new server
is the submission server.



-- 
Regards,
John Levine, johnl@taugh.com, Primary Perpetrator of "The Internet for Dummies",
Please consider the environment before reading this e-mail. https://jl.ly

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Thread

SMART_HOST to port 465 or 587? John Levine <johnl@taugh.com> - 2026-04-13 18:28 +0000
  Re: SMART_HOST to port 465 or 587? kalevi@kolttonen.fi (Kalevi Kolttonen) - 2026-04-13 18:33 +0000
    Re: SMART_HOST to port 465 or 587? John Levine <johnl@taugh.com> - 2026-04-13 19:28 +0000
      Re: SMART_HOST to port 465 or 587? kalevi@kolttonen.fi (Kalevi Kolttonen) - 2026-04-13 20:18 +0000
        Re: SMART_HOST to port 465 or 587? John Levine <johnl@taugh.com> - 2026-04-13 21:14 +0000
          Re: SMART_HOST to port 465 or 587? kalevi@kolttonen.fi (Kalevi Kolttonen) - 2026-04-13 21:39 +0000
          Re: SMART_HOST to port 465 or 587? Hugo Villeneuve-Lapointe <hugo_villap@email.invalid> - 2026-04-13 18:11 -0400
            Re: SMART_HOST to port 465 or 587? John Levine <johnl@taugh.com> - 2026-04-14 00:15 +0000
              Re: SMART_HOST to port 465 or 587? Hugo Villeneuve-Lapointe <hugo_villap@email.invalid> - 2026-04-13 23:27 -0400
                Re: SMART_HOST to port 465 or 587? Claus Aßmann <INVALID_NO_CC_REMOVE_IF_YOU_DO_NOT_POST_ml+sendmail(-no-copies-please)@esmtp.org> - 2026-04-14 02:20 -0400
                Re: SMART_HOST to port 465 or 587? Hugo Villeneuve-Lapointe <hugo_villap@email.invalid> - 2026-04-14 22:24 -0400
                Re: SMART_HOST to port 465 or 587? Bjørn Mork <bjorn@mork.no> - 2026-04-14 08:26 +0200
                Re: SMART_HOST to port 465 or 587? John Levine <johnl@taugh.com> - 2026-04-14 18:27 +0000
  Re: SMART_HOST to port 465 or 587? Andrzej Adam Filip <anfi@onet.eu> - 2026-04-13 21:00 +0200

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