dot.gov - Email Domain Verification & Deliverability Report

The domain dot.gov belongs to the U.S. Department of Transportation (DOT), the federal cabinet department responsible for the nation's transportation systems and infrastructure. Headquartered in Washington, D.C., the DOT oversees aviation (FAA), highways (FHWA), railroads (FRA), transit, and maritime transportation to ensure safe, efficient movement of people and goods.

As a federal .gov domain, dot.gov complies with CISA Binding Operational Directive 18-01, mandating DMARC, SPF, and DKIM implementation. The Department of Transportation's regulatory role makes it a target for phishing attacks aimed at transportation companies, contractors, and the traveling public seeking safety or regulatory information.

DOT mail servers do not operate as catch-all systems. The SMTP infrastructure rejects messages to nonexistent recipients at the connection level. Federal email servers for dot.gov employ greylisting, rate limiting, and strict sender validation to manage inbound correspondence securely.

Delivering email to dot.gov requires strict adherence to authentication standards. Federal email gateways apply thorough content filtering, attachment scanning, and reputation-based sender evaluation. Full SPF, DKIM, and DMARC compliance and a clean sending reputation are necessary for reliable delivery to DOT staff inboxes.

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