What is anti-virus scanning in email?

Anti-virus scanning in email examines messages and attachments for malware before delivery. It is a fundamental security layer that protects against viruses, trojans, ransomware, and other malicious payloads.

Scanning uses multiple techniques. Signature matching compares attachments against databases of known malware. Heuristic analysis detects suspicious behavior patterns. Sandboxing executes attachments in isolated environments to observe malicious activity.

Most email security products integrate anti-virus from multiple vendors to maximize detection. Products like ClamAV (open source), Sophos, McAfee, and Trend Micro provide scanning engines.

Attachments that fail AV scanning are typically stripped or quarantined. Some organizations block entire message delivery when malware is detected.

Anti-virus scanning is the cargo inspector checking for contraband. Dangerous goods are confiscated before they can cause harm.