DomainPreflight icon
DomainPreflight icon

DomainPreflight

DomainPreflight checks everything that can silently break your email deliverability before you send a single message. Unlike MXToolbox which tells you what's wrong, DomainPreflight tells you exactly how to fix it — with copy-paste DNS records formatted for Cloudflare or...

DNS Preflight running on gmail.com — shows PTR/rDNS check with ASN info (AS15169 · Google LLC), IP blocklist pass, SPF pass, DKIM pass, DMARC upgrade recommendation with copy-paste fix formatted for Cloudflare and Namecheap.

Cost / License

  • Free
  • Open Source (MIT)

Platforms

  • Online
DMARC aggregate report analyzer — paste raw XML from your rua= email, get a visual summary showing sending sources, DKIM/SPF pass/fail per IP, spoofing risk detection, and policy upgrade recommendations.
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AlternativeTo Categories

Network & Admin, Security & Privacy, Development

GitHub repository

  •  1 Stars
  •  0 Forks
  •  0 Open Issues
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DomainPreflight was added to AlternativeTo by metriclogic on and this page was last updated .
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What is DomainPreflight?

DomainPreflight checks everything that can silently break your email deliverability before you send a single message. Unlike MXToolbox which tells you what's wrong, DomainPreflight tells you exactly how to fix it — with copy-paste DNS records formatted for Cloudflare or Namecheap.

Tools included:

  • DNS Preflight — PTR/rDNS, SPF lookup count with recursive tree, DKIM key strength, DMARC policy, alignment engine for 10 providers
  • Email Deliverability — IP reputation, 10+ blocklist checks, email header analyzer
  • WHOIS / Expiry — expiry countdown with risk tiers
  • Dangling Records — subdomain takeover detection
  • Typosquat Monitor — lookalike domain detection
  • DMARC Report Analyzer — paste XML, get visual summary
  • DNS Propagation — check across 5 resolvers

No signup. Nothing leaves your browser. MIT licensed, open source.