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[gnu.org #1448007] Illegal command pipelining by lists.gnu.org (209.51.1
From: |
Ian Kelling via RT |
Subject: |
[gnu.org #1448007] Illegal command pipelining by lists.gnu.org (209.51.188.17) |
Date: |
Sat, 09 Nov 2019 12:35:10 -0500 |
On Sat Nov 09 09:16:05 2019, address@hidden wrote:
> Hi, I ran into a problem while trying to subscribe to bug-gnu-emacs. My
> subscription confirmations weren't coming through. I checked the mail
> logs, and the root cause seems to be that lists.gnu.org (209.51.188.17)
> is being rejected by postfix's "postscreen_pipelining_enable = yes"
> check, which looks for incorrect SMTP implementations. We have this
> enabled on our MX to deter some spam bots.
>
> The relevant feature is described at,
>
> http://www.postfix.org/POSTSCREEN_README.html#pipelining
>
> And my logs for one of the sessions:
>
> Nov 9 08:18:19 mx1 postfix/postscreen[10830]: NOQUEUE: reject: RCPT
> from [209.51.188.17]:40601: 450 4.3.2 Service currently unavailable;
> from=<bug-gnu-emacs-bounces+michael=address@hidden>,
> to=<address@hidden>, proto=ESMTP, helo=<lists.gnu.org>
>
> Nov 9 08:18:19 mx1 postfix/postscreen[10830]: COMMAND PIPELINING from
> [209.51.188.17]:40601 after BDAT: Received: from localhost([::1]:36782
> helo=lists1p.gnu.org)\r\n\tby lists.gnu.org with esmtp (Exim 4.90
>
> This was fixed in Exim, it looks like,
>
> https://bugs.exim.org/show_bug.cgi?id=2454
>
> but I wanted to prod you about upgrading because we can't turn that
> feature off and you're probably dropping a significant chunk of mail due
> to it.
>
>
Thanks for the heads up. That is a very new exim, I'm going to look into
a way to avoid this through configuration rather than upgrade.
--
Ian Kelling | Senior Systems Administrator, Free Software Foundation
GPG Key: B125 F60B 7B28 7FF6 A2B7 DF8F 170A F0E2 9542 95DF
https://fsf.org | https://gnu.org
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