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Re: rdns resolving not working for IPv4

From Lew Pitcher <lew.pitcher@digitalfreehold.ca>
Newsgroups comp.mail.sendmail
Subject Re: rdns resolving not working for IPv4
Date 2026-04-08 21:23 +0000
Organization A noiseless patient Spider
Message-ID <10r6h19$3t755$1@dont-email.me> (permalink)
References (2 earlier) <10r10tf$fr$1@news.misty.com> <10r3113$2rm5f$1@dont-email.me> <10r3jvl$677$1@news.misty.com> <10r67m6$3q5up$1@dont-email.me> <10r67pc$3q5up$2@dont-email.me>

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On Wed, 08 Apr 2026 20:46:04 +0200, Marco Moock wrote:

> On 08.04.2026 20:44 Uhr Marco Moock wrote:
> 
>> On 07.04.2026 14:55 Uhr Claus Aßmann wrote:
>> 
>> > Hence try
>> > echo '/map resolve [95.216.221.164]' | sendmail -bt 
>> > ...
>> > map_lookup: resolve ([95.216.221.164]) returns
>> > smtp.eternal-september.org<OKR> (0)
>> > 
>> > If it is something else on your system then you have to figure out
>> > what is broken in nsswitch.conf.  
>> 
>> $ echo '/map resolve [95.216.221.164]' | sudo sendmail -bt
>> [sudo] password for u: 
>> ADDRESS TEST MODE (ruleset 3 NOT automatically invoked)
>> Enter <ruleset> <address>
>> > map_lookup: resolve ([95.216.221.164]) returns
>> > smtp.eternal-september.org<OKR> (0)  
>> 
>> That looks fine for me.
>> 
>> Is there anything else I can test?
> 
> I've tested to use
> hosts:          files dns
> same result.

Just on the off chance that "files" is causing a problem,
is either eternal-september.org or 95.216.221.164 in your
  /etc/hosts
or
  /etc/networks
files?


-- 
Lew Pitcher
"In Skills We Trust"
Not LLM output - I'm just like this.

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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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