Amitai Schleier

@schmonz@schmonz.com

Force multiplier.
Outcome improver.
Decision sharer.
Developer, leader, coach.
https://agilein3minut.es podcaster.
Musician.
Bad poet (award-winning).
Joined: Apr 05, 2017 (@octodon.social)
SelfHosted: Mar 30, 2025
Pronouns: he/they
Podcast: ✔ https://agilein3minut.es
Consultancy: ✔ https://latentagility.com
More: ✔ https://schmonz.com
Keyoxide: aspe:keyoxide.org:PAC6KHICU3QSHQZVPJCZFS7KIA
1 ★ 1 ↺
Nathan Arthur boosted

[?]Amitai Schleier »
@schmonz@schmonz.com

Another from trick:

To enable , simply uncomment "greylisting-spp-wrapper" in control/smtpplugins. That’s it.

(Add any exempt recipient addresses to control/greylist/exemptrcpts, or entire recipient domains to control/greylist/exemptrcpthosts.)

    ...
    0 ★ 0 ↺

    [?]Amitai Schleier »
    @schmonz@schmonz.com

    Another neat trick with from :

    The default SMTP configuration rejects nonexistent recipients.

    (qmail famously accepts all recipients for its domains even when those recipients don't exist, and then has to queue totally avoidable bounce messages. But you won't.)

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      [?]Amitai Schleier »
      @schmonz@schmonz.com

      For our next trick with from :

      Want to SMTP-reject SPF failures when the source domain specifies explicit-fail?

      1. Add SPP_SPF_RESULT_FAIL="E550 spf_smtp_msg" to
      control/tcprules/smtp
      2. Run "/etc/rc.d/qmailsmtpd cdb"
      3. There is no 3rd thing, is that clear?

        ...
        0 ★ 0 ↺

        [?]Amitai Schleier »
        @schmonz@schmonz.com

        #qmail lacks #TLS. #notqmail doesn't include it either (yet!). But if you install from #pkgsrc…

        \# chown qmaild:nofiles control/servercert.pem
        \# chmod 640 control/servercert.pem
        \# ln -s control/servercert.pem control/clientcert.pem
        \# update_tmprsadh
        \# /etc/rc.d/qmail restart

        🔐

          ...
          0 ★ 0 ↺

          [?]Amitai Schleier »
          @schmonz@schmonz.com

          with via :

          echo srs.dom.ain > control/srs_domain
          echo "$SECRET" > control/srs_secrets
          echo srs.dom.ain >> control/rcpthosts
          echo srs.dom.ain:srs >> control/virtualdomains
          echo "| srsfilter" > alias/.qmail-srs-default

          + MX for srs.dom.ain

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