Email Deliverability Test
Will your mail reach the inbox? One score across the authentication trio — SPF, DKIM and DMARC — plus MTA-STS, TLS-RPT and BIMI, with the exact fix for anything failing. Gmail and Yahoo now require SPF + DKIM + DMARC for bulk senders.
The authentication trio
- SPF — which servers may send as your domain. Exactly one record, ending
-allor~all, within 10 lookups. - DKIM — a cryptographic signature on every message. We probe the common provider selectors; a custom selector may still be configured.
- DMARC — tells receivers what to do when SPF/DKIM fail. Move from
p=nonetoquarantinethenreject.
Related
Frequently asked questions
▸ ▾ What makes email land in spam?
Missing or misaligned authentication (SPF, DKIM, DMARC), poor sender reputation, blocklist listings and spammy content. This tool checks the authentication side you control via DNS.
▸ ▾ Why can't you always find my DKIM?
DKIM keys live under a selector the sender chooses, so there's no fixed place to look. We probe common provider selectors; a custom selector may still be configured.
▸ ▾ Do Gmail and Yahoo require all three?
Yes — since 2024 bulk senders need SPF, DKIM and DMARC, plus one-click unsubscribe and a low complaint rate, or mail is bounced rather than just spam-foldered.