[Mailman-Users] Users complain, they don't receive mails from the list

Larry Turnbull larry at acbradio.org
Sun Feb 14 08:37:28 EST 2016

This is definitely a blacklist issue.

When you see the message  "the server refused to talk to me" it means that
the ip address where the mailman messages are coming from is on their

To resolve this the host provider where the mailman list in question resides
needs to contact the internet service provider that is blocking the message
and work with them to get them to lift the block.

I have had to do this many times with different internet service providers.

Each provider has a different process that you have to go through to get the
block lifted.

Most of them, the administrator of the mailman host provider has to fill out
a form online to explain that they are not a spammer.

I am the server administrator for an organization known as the American
Council of the blind and I ended up routing our smtp services through a
service called mandrill which is put out by Mail Chimp.

This put an end to the constant problem of internet service providers
blacklisting our servers since we have a lot of mailman lists.

I also recommend the munge from option because many host providers such as
yahoo have a DMarc policy in place that will cause bounce messages to occur

Hope that helps.

Larry Turnbull
ACB Radio Managing Director and ACB Server Administrator

-----Original Message-----
From: Mailman-Users
[mailto:mailman-users-bounces+larry=acbradio.org at python.org] On Behalf Of
Richard Damon
Sent: Sunday, February 14, 2016 6:32 AM
To: mailman-users at python.org
Subject: Re: [Mailman-Users] Users complain, they don't receive mails from
the list

Have you contacted the provider as mentioned in the bounce message, THEY
need to look at the logs to see what is the problem.

The fact that the diagnostic code header ends in (BL) makes me wonder if you
are on some sort of Blocking List, but that is just a guess,

The admin at t-online.de will have to confirm and if so let you know what

On 2/14/16 3:13 AM, Sascha Rissel wrote:
> Hi,
> again I'm getting bounces for one specific provider: Germany's T-Online.
> The bounce log itself doesn't show something worth mentioning, but 
> here's the bounce message I'm receiving.
> Could you maybe have a look?
> Kind regards,
> Sascha.
> This is a Mailman mailing list bounce action notice:
>      List:       rcworms-vorstand
>      Member:     some_user at t-online.de
>      Action:     Subscription disabled.
>      Reason:     Excessive or fatal bounces.
> The triggering bounce notice is attached below.
> Questions? Contact the Mailman site administrator at 
> mailman at euve103340.serverprofi24.de.
> ---------- Weitergeleitete Nachricht ----------
> From: Mail Delivery System <MAILER-DAEMON at lists.rc-worms.de>
> To: rcworms-vorstand-bounces at euve103340.serverprofi24.de
> Cc:
> Date: Sat, 13 Feb 2016 12:38:02 +0000 (UTC)
> Subject: Undelivered Mail Returned to Sender This is the mail system 
> at host lists.rc-worms.de.
> I'm sorry to have to inform you that your message could not be 
> delivered to one or more recipients. It's attached below.
> For further assistance, please send mail to postmaster.
> If you do so, please include this problem report. You can delete your 
> own text from the attached returned message.
>                     The mail system
> <some_user at t-online.de>: host mx03.t-online.de[] refused 
> to talk to
>      me: 554 IP= - A problem occurred. (Ask your 
> postmaster for help
>      or to contact tosa at rx.t-online.de to clarify.) (BL)
> Final-Recipient: rfc822; some_user at t-online.de
> Original-Recipient: rfc822;some_user at t-online.de
> Action: failed
> Status: 4.0.0
> Remote-MTA: dns; mx03.t-online.de
> Diagnostic-Code: smtp; 554 IP= - A problem occurred. (Ask your
>      postmaster for help or to contact tosa at rx.t-online.de to 
> clarify.) (BL)

Richard Damon

Mailman-Users mailing list Mailman-Users at python.org
Mailman FAQ: http://wiki.list.org/x/AgA3 Security Policy:
http://wiki.list.org/x/QIA9 Searchable Archives:

More information about the Mailman-Users mailing list