SubRosaSoft today announced the availability of MailGuardian 1.5, the latest release of its collection of tools that help guard users’ email. MailGuardian is priced at US$24.95. One of the major new features of version 1.5 is AutoResponse, which will allow users to reply automatically to all emails, or customize to look for emails with specific keywords. Mail Guardian 1.5 requires Max OS X and is priced at US$24.95.