Rapid spam filtering system.
Spam filtering with DKIM, SPF and DMARC checks, rate limits and Bayesian scoring; no hosted threat feeds or sandboxing.
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Proofpoint
Hosted email security and filtering that screens inbound mail for spam, phishing and malware. A closed product from Proofpoint.
Rspamd. 1 alternatives to Proofpoint, in C. Compare fit, licence, stars and the latest signed release.
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