Tools Mail tester
Mail tester
3 free tests a dayFind out why your email lands in junk.
Emails going to junk? Send one email from your usual inbox to a test address. You get a score out of 10, SPF, DKIM, DMARC and blocklist checks, the spam filter rules it trips and a step by step list of what to fix. Free, no sign up.
- A score out of 10
- Every fix spelt out
- Deleted after 7 days
Built with Workers, D1, Amazon SES
Your test address
Subscribers get 20 tests a month, free, and hear when there's something new on paulobrien.dev.
3 free tests a day without subscribing. Your test address works for one email. The report is kept for 7 days, then deleted with the email.
news@brightwell.co.uk
// what it checks
What you get.
Did it prove it's you
SPF, DKIM and DMARC as the receiving server saw them, and whether they line up with your From address.
What spam filters think
The rules your message trips, the score each one costs and Gmail, Yahoo and Microsoft's sender rules.
The sending server
Its reverse DNS, its place on the main blocklists and every link in the message.
// how it works
Three steps.
- Get your test address
Press the button for a one-off address made just for you.
- Send one email
Send it from the inbox or app you normally use, just as you'd send any other email.
- Read your report
As soon as it arrives you get a score out of 10 and a list of what to fix, most important first.
// questions
Good to know.
Do I need to subscribe?
No. You can run 3 tests a day without subscribing. Subscribers get 20 tests a month.
What should I send?
The kind of email you're worried about: a newsletter, an invoice or a normal reply. The test looks at how it was sent as well as what's in it.
Is my email kept?
Your test address works for one email. The report is kept for 7 days, then deleted with the email.
// more tools
More tools I've built.
DNS checker
Check your domain's email records: SPF, DKIM, DMARC, MX, MTA-STS, blocklists and expiry.
Try itDMARC report reader
Upload DMARC report files and see who sends email as your domain, and whether it passed.
Try itIP checker
Find out where an email really came from: who runs the IP address, whether it's a VPN and whether it's on an email blocklist.
Try itStay in the loop
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