Out anti-spam and anti-virus solutions use many industry best practice techniques to block email from known, nefarious sources. The email blocking process covers everything from compromised servers to ‘spam cannon’ services which send email spam across the internet. These blocking techniques include IP blocking lists provided by reputable email industry services and by blocking emails with known attachment types used to exploit peoples’ computers and devices. Rackspace provide admins with tools to blacklist senders at both the domain and mailbox level, blocking any email that matches our blacklists.
If mail circumvents our blocked email checks, advanced content filtering is applied to further detect spam. The content filtering process combines various techniques which analyze email structure and content, and create beacons that identify spam patterns in email. These beacons are integrated with leading email industry sources to collectively report spam, phishing, and viruses. This process results in an extremely effective spam detection and removal system that continually adapts to the every-changing sophistication of spammers.
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