Free Email Deliverability Test: How to Read Your Score and Results (2026)

Will your next email land in spam? This free email deliverability test from Mailwarm tells you in about a minute. Here's how to run it, and how to read every part of the report. Open the Mailwarm email deliverability test and click Start.

You get a unique test address. Send one real email to it, from the same tool and domain you use for your campaigns, with your normal content. No signup needed. About a minute later, you get a score out of 100. This one is 96: Great.

The verdict explains why in plain English: SPF, DKIM and DMARC pass and align, and the spam score is clean.

Here's how to read it. 90 to 100 is great. 75 to 89 is good, with a few gaps. 50 to 74 needs work. Below 50, expect spam placement: fix authentication and blocklists first.

Next: estimated inbox placement at Gmail, Outlook, Yahoo and Apple Mail. Here, 90% likely inbox at Gmail, and 85% at Outlook, where filtering is stricter. These are estimates from one email, not guarantees.

Then: what to fix, in order. Each fix shows its priority, the effort, and the exact steps. Here: add List-Unsubscribe headers before bulk sends, and move SPF from soft fail to hard fail. Fix the top item, then re-test.

And what you're doing well: every check that passed. SPF, DKIM, DMARC, reverse DNS, the SpamAssassin score and your content.

One warning: a great score isn't a reputation. A brand new domain can score 95 and still land in spam until it has built trust. That's what email warmup is for. Mailwarm is an email warmup and deliverability monitoring tool, built by a Y Combinator team since 2020.

Run the free test now. No signup. The link is in the description. And re-test after every fix.