I am working on developing a sophisticated mailing system, which supports different User specific MIME types with Signing and encryption option. Iam getting a strange and simple problem here is the explanation: I extended MimeMultipart as MimeMultipartSigned for signing option. After getting everything iam calling Message msg.setContent(MimeMultipartSigned mmsign); which puts following headers super("signed; protocol="application/x-pkcs7-signature"; micalg=sha1"); but it is not attaching actual BodyPart.If anybody know this or familiar with this type of working please send a mail to srinivas@ernsoftek.com    More>>