[Mailman-Users] Help with Bounce Processing

Futchko, Rose Rose.Futchko at INFORMS.ORG
Mon May 7 23:17:05 CEST 2012

Good Afternoon, 


We are using Mailman 2.15 and have an unusual problem that I was hoping
that someone can help me with. We have close to 109 lists running
successfully, however there are times when bounce processing sends the
following message (over 100 times) in the span of a few hours to one
user/subscriber to the list. They are not the admin:


This is a Mailman mailing list bounce action notice:


    List:       list-society

    Member:     Name

    Action:     Subscription disabled.

    Reason:     Excessive or fatal bounces.


The triggering bounce notice is attached below.


Questions? Contact the Mailman site administrator at




The original message was received at Mon, 7 May 2012 09:50:13 -0400 from
localhost []


   ----- The following addresses had permanent fatal errors ----- 

    (reason: 550 5.1.1 unknown or illegal user: 

    (reason: 550 #5.1.0 Address rejected.)

    (reason: 550 Host unknown)


I understand why a user would get this message if they exceeded their
threshold, but why are over 100 of the same messages being sent to one

Thank you,


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