Inbox Deliverability Test
Send one email to the address below and we’ll grade how it authenticates — SPF, DKIM, DMARC, reverse DNS and sender-quality signals — so you know whether your mail lands in the inbox or the spam folder.
- 1Copy the addressWe generate a unique, one-time test address for you below.
- 2Email itSend any message to it from the mailbox or app you want to test.
- 3Read your scoreThis page updates on its own with your inbox-readiness score and fixes.
Verifying you're human…
Send an email to this address from the mailbox you want to test:
generating…Any subject/body works. We read the authentication results the receiving server records (SPF, DKIM, DMARC) plus sender-quality signals. The address expires in 1 hour.
How it works
You get a one-time address. When you send a real email to it, the receiving server records whether your message passed SPF (is the sending server authorised?), DKIM (is it validly signed?) and DMARC (do those align with your From domain?). We read those verdicts and add checks for reverse DNS on your sending IP and a couple of bulk-sender best practices, then turn it into an inbox-readiness score with fixes.
Why it matters
The three authentication checks are what mailbox providers lean on most to decide inbox vs spam — and since 2024 Gmail and Yahoo require them for bulk senders. Failing any one is the most common reason legitimate mail disappears into spam.
Learn the fundamentals
Frequently asked questions
▸ ▾ Is my email stored?
We analyse the message's headers to read the authentication results, keep the scored report for one hour so you can view it, then it expires. The unique address is single-use.
▸ ▾ What's a good score?
You want SPF, DKIM and DMARC all passing — that's the bulk of the score and what mailbox providers check first. Reverse DNS on your sending IP and a List-Unsubscribe header round it out.
▸ ▾ How is this different from the Email Deliverability Test?
That one inspects your domain's published records (SPF/DKIM/DMARC) from the outside. This one grades a real message you actually sent, using the receiving server's own verdicts — the closest thing to how a mailbox provider sees you.