MX Guarddog

MX Guarddog provides a hosted anti-spam and anti-virus service for small to mid-sized organizations. DNS MX records are pointed to MX Guarddog, which filters all incoming emails. Suspicious items go to quarantine, and daily email summaries let users release or train them as needed. The service also blocks phishing links, embedded malware, and uses heuristic-based spam detection. Outbound mail scanning prevents domain blacklisting. Because it’s priced per domain with unlimited mailboxes, it’s cost-effective for small businesses with multiple user accounts.