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Spam Filters: Protect Your Inbox
March 2, 2026
The Spam Problem
Spam emails waste time and can contain malware. Good filtering is essential.
How Do Spam Filters Work?
Content Analysis
Suspicious words and patterns are detected.
Sender Reputation
Known spammers get blocked.
SPF and DKIM
Verification that an email really comes from a legitimate server.
Spam Filtering in Plesk
Plesk offers built-in spam filtering with SpamAssassin.
Whitelist and Blacklist
Add trusted senders to the whitelist. Permanently block unwanted senders.
False Positives
Sometimes legitimate mail ends up in spam. Check your spam folder regularly.
Setting Up DMARC
Extra verification that prevents spoofing of your domain.