Mail Storage Guard is software designed to protect Microsoft Exchange 2000/2003 and IIS SMTP servers from spam, mail relaying, NDR attacks, and mail-bomb. It works at SMTP and storage levels, safeguarding the server.
Mail Storage Guard tracks every incoming mail that comes to your SMTP server. If an incoming message is spam, it can be deleted, rejected, sent to the mail server administrator, or set to the Bad mail folder. This software extension has several features that ensure optimal protection for your mail server.
Firstly, Mail Storage Guard offers protection on the SMTP protocol level. This allows the program to block messages and get only the head of the message. This protection method significantly reduces incoming internet traffic and completely eliminates harmful programs from entering your server.
Secondly, Mail Storage Guard offers protection on the transport level. This feature enables the manipulation of messages that come to your server but are not yet delivered to the receiver's mailbox. With this protection method, messages can be blocked while being sent to the mail server administrator for analysis.
Thirdly, the software guarantees message delivery only to registered receivers. Microsoft Exchange receives all incoming messages via the SMTP protocol. If the server cannot find the recipient within the system, the message is returned to the sender as a non-delivery report (NDR). However, this scheme has a significant security hole as the sender's address is not checked, allowing the violator to specify any address as a replay address. Mail Storage Guard can reject all "misaddressed" mail or direct such messages to a specified mailbox.
In addition, Mail Storage Guard offers message blocking with the help of Sender's Black-List. This feature allows users to create their blacklist and insert the addresses of spammers. The blacklist allows email addresses as well as email addresses with masks that block entire groups and even entire domains.
Finally, Mail Storage Guard provides message blocking with the help of public DNS blackhole lists, including ORDB, SPAMCOP, SPAMHAUS, DSBL, and others. In conclusion, Mail Storage Guard is an excellent software extension that offers several features for optimal protection of your mail server. So, if you're looking to safeguard your Microsoft Exchange 2000/2003 and IIS SMTP servers, Mail Storage Guard is worth considering.
Version 1.3: N/A