A simple definition
Merriam-Webster describes spam as unsolicited, usually commercial messages distributed broadly by email, text or online posting.
The more you know
Spam and What It Is
Unwanted bulk messages are more than an annoyance—they can carry fraud, phishing attempts and malware.
Spam in digital communication
Dictionary.com describes spam as disruptive unsolicited online messaging, particularly commercial messages sent through email or computer networks.
Why filtering matters
Modern spam frequently imitates trusted organizations, tries to steal account credentials or delivers malicious files and links. Domain-level filtering examines messages before they reach your mail server and places suspicious mail in quarantine for review.