Active Mail utilises the latest antispam technology to ensure your inbox is kept clear from unwanted junk email. Integrated filters assist in preventing phishing attacks on your workforce.

Sender and Recipient Filtering
Sender ID is also used to verify that each e-mail message originates from the Internet domain from which it claims to come from based on the sender's SMTP server IP address. Once a Sender ID record has been verified, the results can be cross-referenced to past traffic patterns and sender reputation, creating an associate weight into the domain reputation.

Connection Filtering
Exchange Server 2007 provides an integrated, IP based block-and-allow list based on sender reputation. Lists are automatically updated as new versions become available. Active Mail can establish additional IP allow-or-deny lists as needed by customers.

Safe Sender List Aggregation
The Hosted Exchange Email Gateway respects Outlook 2003 and Outlook 2007 safe sender lists to help reduce false positives.

Sender ID
Exchange Server 2007 embeds support for Sender ID, an e-mail industry initiative designed to verify that each e-mail message originates from the Internet domain from which it claims to come based on the sender's SMTP server IP address. Sender ID helps prevent domain spoofing and protect legitimate senders' domain names and reputation and helps recipients more effectively identify and filter junk e-mail and phishing scams.

Content Filtering
Content is analysed using the Intelligent Message Filter (IMF), Exchange Server's implementation of Microsoft SmartScreen content filtering technology. Anti-phishing capabilities are also built-in to the IMF to help detect fraudulent links or spoofed domains and protect users from these types of online scams. Customers are protected from emerging spam attacks through the automatic filter updates.

Outlook E-Mail Postmark
Exchange 2007 verifies Outlook E-mail Postmarks attached to messages sent from Outlook 2007. The Outlook E-mail Postmark can reduce false positives for messages from legitimate senders that have little to no reputation.

Spam Assessment
In addition to scanning message content, the IMF consolidates guidance from Connection, Sender/Recipient, Sender Reputation, Sender ID verification, and Outlook E-mail Postmark validation to apply a Spam Confidence Level (SCL) rating to a given message.

Service Resilience
The Edge Transport server role controls the inbound SMTP message receipt rate for increased availability. Tar pitting is supported to slow the server response for certain SMTP communication patterns, minimising exposure to directory harvest attacks.

Anti-spam Stamp
Messages filtered by the Edge Transport server role are stamped with information, including why the message was considered spam and which combination of filters and reputation services (IP, domain, sender, recipient, content) determined its spam assessment.