From Newsgroup: news.admin.moderation


Hi,

as of this morning, the above gateway is rejecting submissions to moderated groups from Eternal-September.org:

/var/log/maillog:Apr 5 07:40:03 smtp postfix/smtp[2926952]: C1A845FBE1: to=<sci-physics-research@moderators.isc.org>, relay=pi-dach.dorfdsl.de[82.139.252.17]:25, delay=5.4, delays=1.3/0.02/0.98/3.1, dsn=5.7.1, status=bounced (host pi-dach.dorfdsl.de[82.139.252.17] said: 550 5.7.1 <sci-physics-research@moderators.isc.org>... Fix reverse DNS for 95.216.221.164 (in reply to RCPT TO command))

/var/log/maillog:Apr 5 09:39:23 smtp postfix/smtp[2932973]: 838995FBD6: to=<talk-origins@moderators.isc.org>, relay=pi-dach.dorfdsl.de[82.139.252.17]:25, delay=4.4, delays=2.1/0.02/0.85/1.5, dsn=5.7.1, status=bounced (host pi-dach.dorfdsl.de[82.139.252.17] said: 550 5.7.1 <talk-origins@moderators.isc.org>... Fix reverse DNS for 95.216.221.164 (in reply to RCPT TO command))

host 95.216.221.164
164.221.216.95.in-addr.arpa domain name pointer smtp.eternal-september.org.

host smtp.eternal-september.org
smtp.eternal-september.org has address 95.216.221.164 smtp.eternal-september.org has IPv6 address 2a01:4f9:c010:ad8c::1
--
-f-a|U-e-u-+ rCo -a-a-|-+-+|U
https://www.eternal-september.org

--- Synchronet 3.21f-Linux NewsLink 1.2

From Newsgroup: news.admin.moderation

Il 05/04/2026 14:14, Ray Banana ha scritto:

Hi,

as of this morning, the above gateway is rejecting submissions to moderated groups from Eternal-September.org:

This gw it's managed by marco mook, contact directly him at mm@dorfdsl.de


Sincerely
--
Ivo Gandolfo

--- Synchronet 3.21f-Linux NewsLink 1.2

From Newsgroup: news.admin.moderation

On 05.04.2026 08:14 Uhr Ray Banana wrote:

as of this morning, the above gateway is rejecting submissions to
moderated groups from Eternal-September.org:

/var/log/maillog:Apr 5 07:40:03 smtp postfix/smtp[2926952]:
C1A845FBE1: to=<sci-physics-research@moderators.isc.org>, relay=pi-dach.dorfdsl.de[82.139.252.17]:25, delay=5.4, delays=1.3/0.02/0.98/3.1, dsn=5.7.1, status=bounced (host pi-dach.dorfdsl.de[82.139.252.17] said: 550 5.7.1 <sci-physics-research@moderators.isc.org>... Fix reverse DNS for 95.216.221.164 (in reply to RCPT TO command))

I noticed that it failed for another server too, but certain IPv6 mails
went through.
It seems that only IPv4 rDNS is affected, IPv6 works. Dunno why, I now
disabled the rdns check.

Lookup on the os level is working, so I have to figure out why the MTA
cannot use the results. Thanks for notifying me.
--
kind regards
Marco

Send spam to 1775369693muell@stinkedores.dorfdsl.de

--- Synchronet 3.21f-Linux NewsLink 1.2

From Newsgroup: news.admin.moderation

Thus spake Marco Moock <mm@dorfdsl.de>

[...]

I noticed that it failed for another server too, but certain IPv6 mails
went through.
It seems that only IPv4 rDNS is affected, IPv6 works. Dunno why, I now disabled the rdns check.

Lookup on the os level is working, so I have to figure out why the MTA
cannot use the results. Thanks for notifying me.

I can confirm that it works when my mail server sends via IPv6, but
fails on IPv4 connections:

Apr 5 07:26:52 smtp postfix/smtp[2925901]: 137525FBD6: to=<misc-test-moderated@moderators.isc.org>, relay=pi-dach.dorfdsl.de[2a01:170:118f:30::33]:25, delay=2.2, delays=0.86/0.02/1.1/0.14, dsn=2.0.0, status=sent (250 2.0.0 6357QqWb003369 Message accepted for delivery)

Apr 5 07:40:03 smtp postfix/smtp[2926952]: C1A845FBE1: to=<sci-physics-research@moderators.isc.org>, relay=pi-dach.dorfdsl.de[82.139.252.17]:25, delay=5.4, delays=1.3/0.02/0.98/3.1, dsn=5.7.1, status=bounced (host pi-dach.dorfdsl.de[82.139.252.17] said: 550 5.7.1 <sci-physics-research@moderators.isc.org>... Fix reverse DNS for 95.216.221.164 (in reply to RCPT TO command))
Apr 5 09:39:23 smtp postfix/smtp[2932973]: 838995FBD6: to=<talk-origins@moderators.isc.org>, relay=pi-dach.dorfdsl.de[82.139.252.17]:25, delay=4.4, delays=2.1/0.02/0.85/1.5, dsn=5.7.1, status=bounced (host pi-dach.dorfdsl.de[82.139.252.17] said: 550 5.7.1 <talk-origins@moderators.isc.org>... Fix reverse DNS for 95.216.221.164 (in reply to RCPT TO command))

Apr 5 10:22:21 smtp postfix/smtp[2935076]: BDD735FBD6: to=<news-admin-moderation@moderators.isc.org>, relay=pi-dach.dorfdsl.de[2a01:170:118f:30::33]:25, delay=2, delays=1.1/0.02/0.71/0.09, dsn=2.0.0, status=sent (250 2.0.0 635AMLUE003997 Message accepted for delivery)

Apr 5 17:13:58 smtp postfix/smtp[2955988]: 336F35FBD6: to=<sci-physics-research@moderators.isc.org>, relay=pi-dach.dorfdsl.de[82.139.252.17]:25, delay=3.1, delays=0.91/0/0.85/1.3, dsn=5.7.1, status=bounced (host pi-dach.dorfdsl.de[82.139.252.17] said: 550 5.7.1 <sci-physics-research@moderators.isc.org>... Fix reverse DNS for 95.216.221.164 (in reply to RCPT TO command))

Apr 5 18:26:06 smtp postfix/smtp[2960160]: 24B705FBD6: to=<misc-test-moderated@moderators.isc.org>, relay=pi-dach.dorfdsl.de[2a01:170:118f:30::33]:25, delay=2.1, delays=0.93/0/1.1/0.09, dsn=2.0.0, status=sent (250 2.0.0 635IQ5bD005057 Message accepted for delivery)

Apr 5 18:27:51 smtp postfix/smtp[2960160]: DA6965FBD6: to=<misc-test-moderated@moderators.isc.org>, relay=pi-dach.dorfdsl.de[82.139.252.17]:25, delay=4.9, delays=0.56/0/2.2/2.2, dsn=5.7.1, status=bounced (host pi-dach.dorfdsl.de[82.139.252.17] said: 550 5.7.1 <misc-test-moderated@moderators.isc.org>... Fix reverse DNS for 95.216.221.164 (in reply to RCPT TO command))
--
-f-a|U-e-u-+ rCo -a-a-|-+-+|U
https://www.eternal-september.org

--- Synchronet 3.21f-Linux NewsLink 1.2

From Newsgroup: news.admin.moderation

Il 05/04/2026 20:40, Marco Moock ha scritto:

I noticed that it failed for another server too, but certain IPv6 mails
went through.
It seems that only IPv4 rDNS is affected, IPv6 works. Dunno why, I now disabled the rdns check.

Lookup on the os level is working, so I have to figure out why the MTA
cannot use the results. Thanks for notifying me.

Marco 2 thing:

- sorry, on previous post reply to Ray I mistyped your name
- I have same trouble on paganini server I manage, I think it's the
local resolver fault (buggy? IDK). I solved using external resolver.



Sincerely
--
Ivo Gandolfo

--- Synchronet 3.21f-Linux NewsLink 1.2

From Newsgroup: news.admin.moderation

According to Marco Moock <mm@dorfdsl.de>:

Lookup on the os level is working, so I have to figure out why the MTA
cannot use the results. Thanks for notifying me.

Looks like something else was also wrong on the 1st. Times are EDT, UTC-04:00.


| 0018938 | 82.139.252.17 | 2026-04-01 06:01:02 | Failed | pi-dach.dorfdsl.de | ZSorry, I wasn't able to establish an SMTP connection. (#4.4.1)
|
| 0018939 | 82.139.252.17 | 2026-04-01 18:01:03 | Failed | pi-dach.dorfdsl.de | ZSorry, I wasn't able to establish an SMTP connection. (#4.4.1)
|
| 0018940 | 82.139.252.17 | 2026-04-02 06:01:05 | Failed | pi-dach.dorfdsl.de | ZSorry, I wasn't able to establish an SMTP connection. (#4.4.1)
|
| 0018941 | 82.139.252.17 | 2026-04-02 18:01:05 | Failed | pi-dach.dorfdsl.de | ZSorry, I wasn't able to establish an SMTP connection. (#4.4.1)
|
| 0018942 | 82.139.252.17 | 2026-04-03 06:01:05 | Failed | pi-dach.dorfdsl.de | ZSorry, I wasn't able to establish an SMTP connection. (#4.4.1)
|
| 0018943 | 82.139.252.17 | 2026-04-03 18:01:00 | Failed | pi-dach.dorfdsl.de | ZSorry, I wasn't able to establish an SMTP connection. (#4.4.1)
|
| 0018944 | 82.139.252.17 | 2026-04-04 06:01:05 | Failed | pi-dach.dorfdsl.de | ZSorry, I wasn't able to establish an SMTP connection. (#4.4.1)
|
| 0018945 | 82.139.252.17 | 2026-04-04 18:00:02 | Failed | pi-dach.dorfdsl.de | ZSorry, I wasn't able to establish an SMTP connection. (#4.4.1)
|
| 0018946 | 0.0.0.0 | 2026-04-05 06:00:00 | Failed | moderators.individual.net | No A records |
| 0018946 | 82.139.252.17 | 2026-04-05 06:00:07 | Failed | pi-dach.dorfdsl.de | h82.139.252.17 does not like recipient.
Remote host said: 550 5.7.1 <comp-compilers@moderators.isc.org>... Fix reverse DNS for 192.55.226.66
DGiving up on 82.139.252.17.
--
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

--- Synchronet 3.21f-Linux NewsLink 1.2

From Newsgroup: news.admin.moderation

On 06.04.2026 07:11 Uhr Ivo Gandolfo wrote:

- I have same trouble on paganini server I manage, I think it's the
local resolver fault (buggy? IDK). I solved using external resolver.

I reinstalled the OS and used systemd-resolve on the system as a local
stub resolver. Resolving the PTR manually using dig with @127.0.0.53
works fine.
--
kind regards
Marco

Send spam to 1775452312muell@stinkedores.dorfdsl.de

--- Synchronet 3.21f-Linux NewsLink 1.2

From Newsgroup: news.admin.moderation

On 06.04.2026 07:11 Uhr John Levine wrote:

According to Marco Moock <mm@dorfdsl.de>:

Lookup on the os level is working, so I have to figure out why the
MTA cannot use the results. Thanks for notifying me.

Looks like something else was also wrong on the 1st. Times are EDT, UTC-04:00.

Device was offline.
--
kind regards
Marco

Send spam to 1775452319muell@stinkedores.dorfdsl.de

--- Synchronet 3.21f-Linux NewsLink 1.2

From Newsgroup: news.admin.moderation

On 06.04.2026 07:11 Uhr Ray Banana wrote:

I can confirm that it works when my mail server sends via IPv6, but
fails on IPv4 connections:

Yesterday evening I disabled the require_rdns feature in sendmail, but
I need to investigate the issue.
--
kind regards
Marco

Send spam to 1775452310muell@stinkedores.dorfdsl.de

--- Synchronet 3.21f-Linux NewsLink 1.2