Encrypt/Decrypt with SMTP/FTP


How does webMethods support for encrpt/decrypt with FTP/SMTP protocol?
Is there an easy way to implement security with Digital certification and
encryption while using SMTP/FTP protocpl for
document exchange?

There are some services regarding S/Mime in B2bServer. Do I need to use these services for this purpose?
I appriciate help of you.

Thanks & Regards,
Mani Bansal