Free Email Deliverability Test

How to test your email deliverability

The test runs on a real message, so the only thing you supply is an email you can send from the account you want to test.

1. Open Email Detective. It gives you a one-off email address, with a Copy button beside it.
2. Send an email to that address from the account or the app you want to test. Use the kind of message you normally send, because the spam score and the written analysis read the message itself.
3. Watch the page. It waits for your message, then fills in the score card as each check finishes.

Why good emails land in spam

A receiving server decides where your message goes before anybody reads it. It weighs whether your domain vouched for the send, what your sending IP and domain look like on public block lists, and what the message itself says. Well-written copy sent from an unauthenticated domain still lands in spam.

Authentication comes first, because it decides whether a receiver trusts your domain at all. How SPF, DKIM and DMARC work shows what each record looks like and how to tighten a DMARC policy in stages.

Reputation comes next. A blacklist listing sits on the sending IP or the sending domain rather than on one message, so rewriting an email will not clear it. What an email blacklist is and how to avoid one explains how listings happen and how to get delisted, and what domain reputation is and how to improve it covers reputation beyond listings.

Content matters least of the three, but it still matters. Spam trigger words to avoid lists the wording filters react to. If Gmail in particular is where your mail disappears, why Gmail blocks email and how to fix it goes through what it expects from a sender.