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Re: rdns resolving not working for IPv4

From Claus Aßmann <INVALID_NO_CC_REMOVE_IF_YOU_DO_NOT_POST_ml+sendmail(-no-copies-please)@esmtp.org>
Newsgroups comp.mail.sendmail
Subject Re: rdns resolving not working for IPv4
Date 2026-04-09 13:48 -0400
Organization MGT Consulting
Message-ID <10r8oor$ekq$1@news.misty.com> (permalink)
References <10r0cbo$240cu$4@dont-email.me> <10r3113$2rm5f$1@dont-email.me> <10r3jvl$677$1@news.misty.com> <10r67m6$3q5up$1@dont-email.me>

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Does this happen all the time or does the IP sometimes resolve?

Please post some log entries which shows relay=  other than STARTTLS,
e.g., something like this from= entry:

639Hfi1E097507: from=<info@serviciosdecontrol.com>, ..., relay=career.serviciosdecontrol.com [91.237.124.226] (may be forged)

esp. for smtp.eternal-september.org

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rdns resolving not working for IPv4 Marco Moock <mm@dorfdsl.de> - 2026-04-06 15:27 +0200
  Re: rdns resolving not working for IPv4 Claus Aßmann <INVALID_NO_CC_REMOVE_IF_YOU_DO_NOT_POST_ml+sendmail(-no-copies-please)@esmtp.org> - 2026-04-06 12:29 -0400
    Re: rdns resolving not working for IPv4 Marco Moock <mm@dorfdsl.de> - 2026-04-06 20:26 +0200
      Re: rdns resolving not working for IPv4 Claus Aßmann <INVALID_NO_CC_REMOVE_IF_YOU_DO_NOT_POST_ml+sendmail(-no-copies-please)@esmtp.org> - 2026-04-06 15:18 -0400
        Re: rdns resolving not working for IPv4 Claus Aßmann <INVALID_NO_CC_REMOVE_IF_YOU_DO_NOT_POST_ml+sendmail(-no-copies-please)@esmtp.org> - 2026-04-06 16:13 -0400
        Re: rdns resolving not working for IPv4 Marco Moock <mm@dorfdsl.de> - 2026-04-07 15:32 +0200
          Re: rdns resolving not working for IPv4 Claus Aßmann <INVALID_NO_CC_REMOVE_IF_YOU_DO_NOT_POST_ml+sendmail(-no-copies-please)@esmtp.org> - 2026-04-07 14:55 -0400
            Re: rdns resolving not working for IPv4 Marco Moock <mm@dorfdsl.de> - 2026-04-08 20:44 +0200
              Re: rdns resolving not working for IPv4 Marco Moock <mm@dorfdsl.de> - 2026-04-08 20:46 +0200
                Re: rdns resolving not working for IPv4 Lew Pitcher <lew.pitcher@digitalfreehold.ca> - 2026-04-08 21:23 +0000
                Re: rdns resolving not working for IPv4 Marco Moock <mm@dorfdsl.de> - 2026-04-09 19:36 +0200
                Re: rdns resolving not working for IPv4 Lew Pitcher <lew.pitcher@digitalfreehold.ca> - 2026-04-09 18:23 +0000
                Re: rdns resolving not working for IPv4 Marco Moock <mm@dorfdsl.de> - 2026-04-09 20:30 +0200
                Re: rdns resolving not working for IPv4 Claus Aßmann <INVALID_NO_CC_REMOVE_IF_YOU_DO_NOT_POST_ml+sendmail(-no-copies-please)@esmtp.org> - 2026-04-09 02:42 -0400
                Re: rdns resolving not working for IPv4 Marco Moock <mm@dorfdsl.de> - 2026-04-09 20:02 +0200
                Re: rdns resolving not working for IPv4 Bjørn Mork <bjorn@mork.no> - 2026-04-09 20:48 +0200
                Re: rdns resolving not working for IPv4 Marco Moock <mm@dorfdsl.de> - 2026-04-09 21:16 +0200
                Re: rdns resolving not working for IPv4 Claus Aßmann <INVALID_NO_CC_REMOVE_IF_YOU_DO_NOT_POST_ml+sendmail(-no-copies-please)@esmtp.org> - 2026-04-09 15:07 -0400
              Re: rdns resolving not working for IPv4 Claus Aßmann <INVALID_NO_CC_REMOVE_IF_YOU_DO_NOT_POST_ml+sendmail(-no-copies-please)@esmtp.org> - 2026-04-09 13:48 -0400
                Re: rdns resolving not working for IPv4 Marco Moock <mm@dorfdsl.de> - 2026-04-09 20:15 +0200
                Re: rdns resolving not working for IPv4 Claus Aßmann <INVALID_NO_CC_REMOVE_IF_YOU_DO_NOT_POST_ml+sendmail(-no-copies-please)@esmtp.org> - 2026-04-09 14:23 -0400
                Re: rdns resolving not working for IPv4 Marco Moock <mm@dorfdsl.de> - 2026-04-09 20:38 +0200

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