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SpamBulk
Mailshell uses two primary methods for identifying
mail sent in bulk:
1. For each email, Mailshell creates a fingerprint
ID of the message. Unlike conventional fingerprint hashes,
Mailshell's fingerprints only include elements of the message
hardest for spammers to fake or change.
- The fingerprints are added to Mailshell's database of
fingerprints and then queried when analyzing new, incoming
mail.
- OEM customers receive downloaded caches of the most
active, useful fingerprints or can opt for real-time checks
of Mailshell's remote network.
2. Mailshell's patent-pending ID Module bulk
detection system uses Bayesian analysis to detect whether
a message was sent via bulk email.
- Bayesian statistical analysis calculates 'sameness'
among messages, i.e., it determines whether 'Message A'
is fundamentally the same as 'Message B' despite spammers'
efforts to obfuscate.
- Though many anti-spam solutions, including Mailshell's,
use Bayesian filtering to analyze message content, Mailshell
is the only solution to use Bayesian analysis to detect
bulk mail.
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