perhaps you can try the GAE mail class directly as shown here: http://code.google.com/appengine/docs/python/mail/attachments.html ?
- [web2py] Attaching files stored in blobstore in a m... Saurabh S
- [web2py] Re: Attaching files stored in blobsto... Alan Etkin
- [web2py] Re: Attaching files stored in blo... Saurabh S
- [web2py] Re: Attaching files stored in... Alan Etkin
- [web2py] Re: Attaching files store... howesc
- [web2py] Re: Attaching files ... Saurabh S
- Re: [web2py] Re: Attachin... Christian Foster Howes
- [web2py] Re: Attachin... Saurabh S
- [web2py] Re: Attachin... howesc
- [web2py] Re: Attachin... Saurabh S
- [web2py] Re: Attachin... howesc
- [web2py] Re: Attachin... Saurabh S