[Mailman-Users] HTML causing list-wide bounce?

[Michael Kabot]

Hi all,
 
I've been using Mailman to run 200+ lists for almost a year now.  Love the
software, very flexibile.  Earlier this week, one of the list owners
notified me that one of his lists had mysteriously removed all of its
members.  
 
After some investigation I found the following:
- Whenever an HTML message was sent from the owner's business address
- The email was processed by Mailman
- Sent to all list members
- All list members immediately bounced, the email never reaches the list
members
- The bounce score threshold causes the list to delete everyone after two
days (as it should)
- I can repeat the behavior from the owner's email account
- If he switches to text email, there is no problem
- no other member of the list is having the issue
- The bounce messages are not being forwarded to the list admin/owner..
 
I am at the end of my level of knowledge and could use some help
diagnosing/fixing what is going on.
 
Here is my server setup:
- Red Hat Fedora Core 4
- Intel Pentium 4 - 3.0 GHz
- 2GB Memory
- Apache 2.0.54
- Qmail 1.03
- Python 2.4.3
- Mailman 2.1.8
- Preconfigured dedicated server with Plesk 8.1
 
Here is additional information
 
The email message causing the issue
-- .html format http://www.soarol.com/tmp/EmailList-HTMLerror-2.html
-- .msg format http://www.soarol.com/tmp/EmailList-HTMLerror-2.msg
-- Its not the attachment, I've checked that...
 
The mailing list configuration
-- http://www.soarol.com/tmp/mailing-list-config.cfg
-- pretty basic
-- No filters
 
SMTP Log is fine
-------------------------
Apr 13 12:10:07 2007 (2020)
<C42C157596C2E148A6C2B9335F1A223A01240F8C at ga016e0m12.<[EMAIL PROTECTED]>>
smtp to elmont704p-sthtml for 3 recips, completed in 0.075 seconds
-------------------------
POST Log is fine
Apr 13 12:10:07 2007 (2020) post to elmont704p-sthtml from <[EMAIL
PROTECTED]>, size=88340,
message-id=<C42C157596C2E148A6C2B9335F1A223A01240F8C at ga016e0m12.<[EMAIL
PROTECTED]>>, success
-------------------------
BOUNCE Log shows issue
- This is a test list I have setup to replicate the problem
- The email is not received by any party
- The list admin/owner receives no messages about the bounce 
- Eventually, as expected, the email addresses will be deleted from the list
by automatic bounce processing scores
Apr 13 12:10:09 2007 (2015) <BounceRunner at -1211075860> processing 3
queued bounces
Apr 13 12:10:09 2007 (2015) elmont704p-sthtml: <[EMAIL PROTECTED]>, already
scored a bounce for date 13-Apr-2007
Apr 13 12:10:09 2007 (2015) elmont704p-sthtml: <[EMAIL PROTECTED]>, already
scored a bounce for date 13-Apr-2007
Apr 13 12:10:09 2007 (2015) elmont704p-sthtml: <[EMAIL PROTECTED]>, already
scored a bounce for date 13-Apr-2007
-------------------------
SMTP-FAILURE
- no record of an issue
 
First question.... is this a Mailman or QMail issue?
Second question... I am surprised that anything in HTML could trigger this
behavior.
 
Your thoughts would be greatly appreciated.

In Service,

Michael Kabot 
President - SOAR 
mkabot at soarol.com  
585-388-0211  
www.soarol.com