Attachment vs Striphtml for tagged messages

[Quentin Campbell]

We are running with the latest MailScanner (and SpamAssassin) releases
and are evaluating with a small group of users the use of the
"attachment" option for messages tagged as spam. The rest of our users
see the "striphtml" behaviour.

We expected that only spam messages with an HTML body would have the
original body moved into an attachment while spam messages with a
non-HTML body would be left as they were.

We are finding that _most_ tagged spam messages, even when they appear
to have no HTML, have the message body moved to an attachment. A few
tagged messages however do not have the body moved into an attachment
but these messages appear to be no different to some that do have the
body moved into an attachment.

What criteria decides which tagged message has its body moved unchanged
into an attachment (and the body replaced with a warning text) and which
has its body left as received?     

What we really want is for the attachment option to do:

  if [ message body is HTML or dangerous ] then
    move body unchanged into an attachment 
  else
    # all text-only messages should get here...
    leave message body as receieved
  fi

This means that any text-only message that is wrongly tagged as spam
will still be readable without having to open an attachment.

As a BTW we note that the "attachment" option works well with Outlook,
Pine, Pegasus, etc, but in the case of Eudora the attachment is opened
automatically when the message body is read. This is precisely the
opposite of what is wanted. It may well be a configurable behaviour on
Eudora but we havn't found the option yet!  

Quentin
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