InboxGuard

InboxGuard is an email deliverability monitoring and remediation platform for engineering teams, deliverability professionals, agencies, and managed service providers. It helps organizations identify and resolve issues that can prevent transactional and lifecycle emails from reaching inboxes. The service continuously checks SPF, DKIM, DMARC, MTA-STS, TLS-RPT, BIMI, DNSSEC, DANE, and 11 DNS blocklists, using RFC-compliant probes without accessing or handling email.

Beyond monitoring, InboxGuard connects with Google Postmaster Tools to display reputation and spam-rate trends, and hosts daily DMARC aggregate reports. Teams can receive severity-based alerts through email, Slack, and webhooks, with escalation options and routing by domain. The platform can also calculate DNS record changes, preview them against live settings, and apply approved fixes through supported registrars, with verification, audit logs, and rollback.

InboxGuard offers an MCP server that lets compatible AI agents scan domains and manage remediation, alongside a REST API and developer resources. Its services include a no-signup domain scan, a free tier for one domain, and paid plans with expanded monitoring and integrations.