MailScanner
MailScanner is an open-source email security and anti-spam gateway tool that filters and processes email traffic on Unix-like systems, primarily used with mail transfer agents like Sendmail or Postfix. It scans incoming and outgoing emails for viruses, spam, phishing attempts, and other malicious content using integrated antivirus engines and spam detection methods such as SpamAssassin. The tool provides extensive logging, reporting, and quarantine features to help administrators manage email security effectively.
Developers and system administrators should learn MailScanner when setting up or maintaining email servers that require robust security against spam, viruses, and malware, especially in enterprise or high-traffic environments. It is particularly useful for integrating with existing mail systems to enhance protection without replacing core infrastructure, offering customizable rules and policies for filtering. Use cases include securing corporate email servers, reducing email-borne threats in hosting services, and complying with security standards that mandate email scanning.