LIVE DNS · 3 CHECKS

Email authentication checker

One domain, three live checks — SPF, common DKIM selectors, and DMARC policy.

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Your mail is being sent unauthenticated. Here is the full fix.

Lower stack cost. Back in the inbox. Built to send at any scale.

We rebuild it properly: secondary domains, inboxes, SPF, DKIM and DMARC set to enforcement, warmup and safe sending limits, blacklist monitoring on top. Send-ready in about 17 days. No campaigns, no copy, no lead lists. Infrastructure only.

Almost a decade building cold outreach infrastructure, including his own sending and verification stack built from scratch. 20+ B2B clients at companies worth $10M and above, all in tier one countries.

Free · Written plan + fixed price · No sales call required

What this checks

  • SPF — who is allowed to send for the domain
  • DKIM — common selectors (google, selector1, default, k1, s1, s2)
  • DMARC — policy at _dmarc.domain

All lookups use public DNS-over-HTTPS. Nothing is logged.

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