If an incoming email is not signed at all, the score is also increased (but less than in the first case). If an incoming email from a domain which has a DNS DomainKey record is not signed, the total "spam" score is increased. NOTE - for Razor2 to function correctly you will ned to open port 2703 on your firewall and/or router.Ĭheck this option to enable DKIM technology. Because the portion is random, and the position of the portion is constantly changing, it is very difficult for Spammers to create a message that will bypass Razor2. Through user contribution, Razor2 establishes a distributed and constantly updating catalogue of spam in propagation that is consulted by email clients to filter out known spam.Įmails are identified by a hashed random portion of the email itself. Razor2 is a distributed, collaborative, spam detection and filtering network. High - Adds 5.0 to the spam score - very strict!įor an introduction to SPF please visit Use Razor2Ĭheck this option to have IceWarp Server use the Razor2 AntiSpam Technology.
Use the slider to tell IceWarp Server what to do when the SPF check returns a "softfail". This relies on the DNS records being published, which is not always the case, and a "softfail" can occur, whereby the technology believes the sending host is not valid but cannot be sure. SPF Technology uses DNS to determine whether a message reported as coming from one domain and originating from another is valid.
sources that are well known for sending out messages intended to defraud people by the capture of bank login or credit card details.Ĭheck this option to enable SPF (Sender Policy Framework) technology. SURBL is an excellent way of identifying "Phishing" sources, i.e. It is much more difficult for a spammer to change his host URI than anything else so this is a very reliable way of identifying them. Rather than trying to identify Spam senders, SURBL works by identifying the presence of the URI's of Spam hosters in the message body. IceWarp Server uses the SpamAssassin rules but has it's own in-house written engine to process them.Ĭheck this option to enable Spam URI Realtime Blocklist technology. This makes it harder for spammers to identify one aspect which they can craft their messages to work around. SpamAssassin uses a wide variety of local and network tests to identify spam signatures. Spamassassin is very good at identifying "phishing" messages that are trying to fool a User into giving out financial information. These rules are constantly being updated as new spamming techniques are introduced. The rules basically check against typical Spam templates.
Spamassassin software#
Software is provided that uses a set of complex rules to ascertain whether a message is spam or genuine. SpamAssassin is a open source project dedicated to fighting spam.
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