SecurityGateway for Exchange/SMTP contains a multitude of tools to detect and prevent the unauthorised use of your email server. [more...]
Relay Control
Relay control limits authorised senders to those with email accounts only.
SMTP Authentication
Specify that users must authenticate with a username and password in order to verify they have the authority to be sending messages through your server.
IP Shielding
IP Shielding works using a database containing pairs of domain names/IP addresses. If a message comes from one of the domain names in the database, SecurityGateway knows it must come from a matching IP address otherwise the message will be blocked.
Dynamic Screening
Dynamic Screening temporarily prevents connections by senders who exhibit spam-like behaviors.
Tarpitting
This feature discourages spammers by slowing down their ability to send high volumes of messages to an email server within a specified length of time.
Bandwidth Throttling
Limit the amount of bandwidth you can afford to allocate to email services to avoid slowdown of other services sharing the same connection.
Attachment Filtering
This option quarantines messages containing specified types of attachments, such as Visual Basic scripts, executable programs and other user defined extensions.
Blacklists and whitelists
Global, domain-specific and account-specific white lists help make sure users receive messages from their regular correspondents. Black lists at these same levels can make sure they do not receive messages from specified domains and individual senders. Specify trusted senders by using their domain, email address, host name, or connecting IP address.