Alternatives
Products that do what MailTest does
Most tools say DKIM failed. MailTest tells you why
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I've spent the last few months working on something I wish I'd had years ago. I kept running into the same issue: CI green, production mail broken. TLS handshake failures, DKIM alignment mismatches, SPF soft-fails ... the stuff that only surfaces when real mail servers are involved. Most test tools (Mailpit, MailHog) are catch-alls. They confirm "an email was sent" but don't validate the protocol. They also aren't designed for network-exposed environments: no auth, unprotected Web UI, easy to enumerate messages. VaultSandbox is my attempt at fixing that. It's a self-hosted SMTP gateway…
Jan 2026 · vaultsandbox.com
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Test SMTP, SPF, DKIM, DMARC & spam score. No signup.
May 2026 · nesdzo.co.uk
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Scan your domain's SPF, DKIM and DMARC in seconds
6d ago · apps.shopify.com
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Instantly audit SPF, DKIM & DMARC to stop landing in spam.
27d ago · web-production-80c77.up.railway.app
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2024 · dmarcchecker.app
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Folderly Lens ▲107Domain health analysis for high performance email campaigns
Jul 2026 · lens.folderly.com
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Check DMARC, SPF and DKIM in DNS Settings
Aug 2026 · protecta360.com
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