InboxGuard — continuous email deliverability monitoring & DMARC reports

Know — don't guess — that your mail reaches the inbox. InboxGuard runs daily scans of SPF, DKIM, DMARC, MTA-STS, TLS-RPT, BIMI, and 13 DNS blocklists for engineering teams shipping transactional and lifecycle email, with hosted DMARC aggregate-report ingest, instant alerts, and one-click DNS remediation. Operated by movaMedia, Inc.

Pricing · Guides · API docs · OpenAPI · For AI agents · llms.txt

What InboxGuard checks

• SPF — with a live 10-DNS-lookup budget meter that catches silent PermError.
• DKIM — selector discovery plus key length and algorithm hygiene.
• DMARC — policy, SPF/DKIM alignment, and staged-rollout guidance (none → quarantine → reject).
• MTA-STS & TLS-RPT — policy fetch, report ingest, and MX TLS certificate health.
• BIMI — record, logo, and VMC certificate-chain validation.
• 13 DNS blocklists — queried from the authoritative side, so there are no public-resolver false positives.
• DMARC aggregate reports — a hosted RUA mailbox per workspace, parsed into per-source-IP dashboards.
• Google Postmaster Tools — Gmail spam-rate and reputation via OAuth.
• Alerts — email, Slack, webhook, and PagerDuty when a posture changes.

Why InboxGuard vs alternatives

Unlike ESP-native dashboards (SendGrid, Postmark) that only see mail sent through them, InboxGuard monitors a domain across every sender. Unlike DMARC-only tools (Dmarcian, Valimail, EasyDMARC), it covers the full authentication, transport-security, and blocklist surface in one 0–100 score — with authoritative-side blocklist queries and one-click DNS remediation. InboxGuard does not send email; pair it with any ESP.

For developers and AI agents

Run a free, anonymous scan of any domain (5/hour per IP): curl -sS -X POST https://api.inboxguard.io/scan-domain -H 'content-type: application/json' -d '{"domain":"example.com"}'. Full reference: /llms-full.txt. API contract: /openapi.json. Authentication: /auth.md. MCP server (Streamable HTTP): https://api.inboxguard.io/mcp.

Pricing

14-day free trial, no credit card. Free (1 domain, weekly), Entry $29/mo (5 domains, daily), Pro $99/mo (25 domains, alerts), Agency $299/mo (100 domains, 4-hour cadence). See pricing.