[Mailman-Users] 8 bit headers causing bounces...

Nigel Metheringham Nigel.Metheringham at vdata.co.uk
Thu Jul 22 13:30:45 CEST 1999

I currently have one subscriber on the list whose From: line contains a 
load of 8 bit data.  This goes through my MTA and mailman quite 
happily, but is being bounced by a number of other remote mailers.

I am talking to the subscriber concerned, however I am a tad concerned 
that this has the potential to be a bigger problem.  Howabout a denial 
of service attack - I send a pile of messages of this type to the list, 
which get bounced by various MTAs and cause the recipients behind the 
picky MTAs to be unsubscribed....

Should mailman be looking at tampering with the basic headers to make 
them more acceptable to all MTAs?   For example should mailman convert 
all 8 bit chars in From/To/Reply-To/Subject etc to be QP encoded?

Or should these mails be identifiable by mailman and held for 
moderating - in which case the list owner needs a way of fixing them up.

[ Nigel Metheringham                  Nigel.Metheringham at VData.co.uk ]
[ Phone: +44 1423 850000                         Fax +44 1423 858866 ]

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