Free tool
Check your domain's SPF, DKIM and DMARC in seconds. Every problem explained in plain English, with the fix.
SPF
Which servers may send email for your domain.
DKIM
The signature that proves an email wasn't faked or changed.
DMARC
What inboxes should do with email that fails, plus reports.
MX
Whether your domain can receive replies and bounces.
Your domain's SPF record, DKIM keys, DMARC policy and MX records, read live from public DNS. It's the same set of records inboxes check before deciding whether to trust your email.
DKIM keys live under a selector chosen by your email provider. We try the most common ones; if yours is different, type it in the selector box (it's the part before ._domainkey).
Yes. No sign-up, no limits for normal use, and we don't store the domains you check.
Missing SPF, DKIM or DMARC is the most common reason good email lands in spam. Fix the items marked in red first; each one links to a plain-English guide.