Pro

Fully-featured SMTP/POP3 mail server program with a range of security features and options to use along with any mail client as a personal local SMTP server or as a stand-alone mail server. It works in the logoff mode; SMTP gateways are supported.

The standard security provided by PDF consists of two different methods and two different passwords. A PDF document may be protected by password for opening ('user' password) and the document may also specify operations that should be restricted.

PDF Password Cracker Professional edition allows to search for "owner" and "user" passwords with brute-force and dictionary attacks, effectively optimized for speed.