Free domain check

A manual DMARC check of your sending domain's email authentication — done by me, not a script. Free, by email, within 48 hours.

What you get

1

SPF/DKIM/DMARC — including alignment

Not just "pass", but whether the domain that passed is actually your From domain. That gap is the single most common thing I find in audits — and Google's green checkmarks won't warn you about it.

2

Blacklist scan

Spamhaus and other major DNSBLs, for your domain and your visible sending infrastructure.

3

A short written assessment

What's broken (if anything), why it matters, and the first fix I'd make. Plain English from a person — not a tool export.

How it works

Email ohmysendcom@gmail.com with the subject "Free Domain Check" and:

I do these by hand, in batches — expect a reply within 48 hours.

Email me your domain →

No card. No form. No signup.

What this check is — and isn't

It checks the authentication layer — the part that's either right or wrong. It won't tell you your inbox placement or your domain reputation trend; that needs Postmaster access and sending history, which is what the paid diagnostic is for.

If the check finds signs of something deeper, I'll say so. That's as far as the pitch goes.

Questions

How is this different from an online DMARC checker?+
A DMARC checker tool reads your public DNS records and stops at pass/fail. I run those same checks, then go where tools can't: whether the domains passing SPF and DKIM actually align with your From domain — the gap Google's green checkmarks won't warn you about — plus a blacklist scan. You get a short written assessment from a person, not a badge.
Is it really free?+
Yes. No card, no form, no newsletter signup. You email me a domain, I email back what I found.
Why free?+
Two reasons: authentication gaps are common enough that some of these turn into paid work, and every check teaches me what's actually breaking in the wild. Both are worth more to me than a price tag on a first conversation.
Will you pitch me afterward?+
I'll tell you what I found and, if it's relevant, what a fix would involve. No sequence, no follow-up campaign.