This check passed.
Keep the working setup and review the other findings.
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FLYING PENGUIN MAIL TESTER
Give your email
a better landing.
Send one test email. See what passes, what needs attention, and what to fix next.
Already sent a test? Retrieve your report01
Your test starts here.
Create an address, then send an email from the mailbox or sending platform you want to test.
Connecting to the tester…
Send a sample without confidential information. Anyone with the test address or results link can see its report for seven days. Email bodies and attachments are not saved by this tool.
01Email per test
03Authentication checks
07Days to revisit your report
FreeNo account required
A SMALL CHECK. A CLEARER PICTURE.
Three steps.
Useful answers.
- 01
Create your address
Every test has a unique address and a private-by-link report.
- 02
Send from your real platform
Use your usual mailbox, website or newsletter service so the test follows the same sending path.
- 03
Read, improve, repeat
Open each check for an explanation. Make a change, then create a fresh test to compare.
FOLLOW THE MESSAGE
A little visibility.
A lot less guesswork.
Your email takes a journey before it reaches an inbox. This test gives you a view from the receiving end.
THE TEST FLIGHTHOW IT WORKS
- Your platformThe real sending path
- Our receiverAuthentication & content
- Your reportFindings you can act on
An explanation of the process. Your actual test results appear above after your email arrives.
KNOW WHAT YOU’RE CHECKING
Three identity checks.
One closer look at your content.
You don’t need to know every acronym. Start with the question each check answers.
The sending permission
Is this server allowed to send for you?
SPF checks the server that sent the message against the envelope sender’s DNS record. It helps a receiver tell an authorised sender from an unexpected one.
SPF
Sending serverEnvelope domainDNS permission
In practiceYour website starts using a new email service. Its sending servers need to be authorised in the right SPF record.
SAME TOOL. DIFFERENT SENDING PATHS.
What are you sending?
Test from the source. Your mailbox, website and newsletter service can have different setups.
Check your everyday email.
Send a normal sample from the account you use with customers. This checks that mailbox’s sending path.
- Use your usual From address.
- Send directly to the generated test address.
- Avoid forwarding an old email as the test.
SAMPLE CONTENT
SubjectA quick follow-up
Thanks for getting in touch. Here are the next steps we discussed.
An illustration, not a test resultREAD THE SIGNALS
A report you can
do something with.
Open any finding to see what it means and a sensible next step. A flag is the start of a useful check.
Worth a closer look.
Content advice depends on the message. A personal email may not need an unsubscribe header.
An authentication check failed.
Investigate the sending service and its DNS setup, then send a fresh test.
The evidence wasn’t clear enough.
This is not a pass or a fail. Missing or ambiguous receiver results stay unverified.
THE BIGGER PICTURE
A pass is a good sign.
There’s more to the inbox.
Sender reputation, recipient engagement, complaints and each provider’s filters also influence delivery. This tool checks authentication and content; it does not predict inbox placement or test blocklists.
BEFORE YOU HIT SEND
Your pre-flight checklist.
A minute of preparation makes the report more useful. Tick these off, then head back to your test address.
Back to the tester0 of 4 ready
These ticks are just for you. They don’t change your test or your results.
Already sent a test?
Paste its address or reference to retrieve the report.
A few useful details.
What do SPF, DKIM and DMARC mean?
SPF checks whether the sending server is authorised. DKIM checks a digital signature. DMARC checks whether a passing SPF or DKIM identity aligns with your visible From domain.
Why can an authenticated email still go to spam?
Authentication is one part of delivery. Sending history, reputation, complaints, engagement and the content of your message also influence the receiving inbox.
What is saved, and for how long?
Reports contain the sender domain, receiving time, check results and counts. They expire after seven days and are removed by scheduled cleanup. This tool does not retain the subject, full addresses, message body or attachments. The receiving provider processes the message to produce the report.
Can I test a newsletter or website email?
Yes. Send a test through the same platform you normally use. Use sample content, keep it under 5 MB, and create a separate address for each test.
Why hasn’t my email arrived yet?
Check that you used the complete test address and sent from the intended platform. Allow a few minutes, then press Refresh. The tester accepts messages up to 5 MB. A sending service may queue or block a test before it reaches us.
Can I compare a change I’ve made?
Yes. Download the first report, make your change, then create a new test address and send through the same platform. Each address keeps the first accepted message, so reusing it will not replace the report.
Do you change my DNS records?
No. The tester reports what the receiving server observed. It does not edit your domain or your sending service. If you need help interpreting the results, speak to Garreth.
Something not adding up?
Garreth can help untangle your sending setup.