Guardian Mail is an email threat protection solution that functions as a blocklist (RBL/DNSBL) service. Operating as a primary defense layer, it filters both inbound and outbound SMTP traffic to protect mail servers against spam, malware, phishing, and scam attempts. This process is designed to prevent malicious inbound emails from reaching infrastructure and to identify compromised accounts sending outbound spam.
The solution achieves a 99.6% catch rate by querying constantly updated threat intelligence lists containing domains, IP addresses, email addresses, and file hashes. It can be integrated without additional hardware installations and supports direct querying and synchronization through standard network protocols and command-line tools.
