Vote for Mail Storage Guard for MS Exchange and IIS

Mail Storage Guard is an extension for Microsoft Exchange 2000/5.5 and IIS SMTP servers, designed to protect your mail server from spam, prevents mail relaying, mail bomb and NDR attacks. The protection is realized both on the level of SMTP protocol and on the level of message delivery to storage. Mail Storage Guard follows all incoming mail which comes to your SMTP server and if the message is spam then it is deleted, rejected, sent to mail server administrator or set to Bad mail folder. Features include: Protection on SMTP protocol level; Protection on transport level; Message delivery only to registered receivers; Message blocking with the help of Senders Black-List; Message blocking with the help of DNS blackhole list; Sending of the blocked messages to mail server administrator and more.