We don't treat S/MIME signatures as attachments anywhere else - 
doesn't make any sense for us to treat it as an attachment here either.

Michael, you know this stuff much better than I do... thoughts?

I have to sign most of my E-Mails, this adds about 9k to every E-Mail 
in my send folder.

Also you can't remove attachments form singed messages



If i understand the MIME_Structure correct it should be possible to 
change form



multipart/signed

    text/plain

    application/pkcs7-signature



to



multipart/mixed

    text/plain

    text/plain



or from



multipart/signed

    multipart/mixed

       text/plain

       application/pdf

    application/pkcs7-signature



to

multipart/mixed

    multipart/mixed

       text/plain

       application/pdf

    text/plain





and the second text/plain part contains a attachmand removed text. 
Maybe with the

results of the last signature tests

I'm guessing it's going to be exceptionally hard, if not impossible, 
to muck with signed/encrypted messages.



Also, is there a particular reason you want to do this?

it would be nice if the stripeAttachment feature would allow to remove 
application/pkcs7-signature part of a SMIME signed E-Mail.