Protecting Email from Spam and Viruses

Mail Security feature is important both to provide spam filtering and to protect users from threats associated with receiving emails with malicious attachments, as well as from phishing, pharming and other types of fraud.

Email Security with UserGate

UserGate enables the filtering of emails by analyzing their contents and using heuristic techniques. Emails in any language, as well as image-based content, may be analyzed. Spam detection center detects spam attacks anywhere in the world. To detect spam and viruses, the processing of gigantic statistical data is also used, based on the analysis of billions of letters received by centers specially created for this purpose (honeypots) and distributed around the world. This approach provides an almost zero level of false detection. The Mail Security module sends the email UID to the cloud service, which determines if the email is spam. The solution does not block an IP address, domain or email address, but a specific email or spam attack.

When processing incoming messages in UserGate, filtering is performed in several stages: by connections, by source address, by destination address and by content. When email traffic is checked using DNSBL, the IP address of the spam sender’s SMTP server is blocked when the SMTP connection is created, thus helping to substantially decrease the load on other methods of checking email for spam and viruses.