Send a test email

Check that a mailbox can receive mail - and see the real SMTP outcome. We send one fixed test message from our delivery infrastructure and show you exactly what the receiving server said. Free, no account needed.

How the test email works

  1. Step 1

    Enter a recipient

    Tell us the mailbox you want to reach. No sign-up, no software to install.

  2. Step 2

    We send one message

    A single fixed test message goes out from our real delivery infrastructure.

  3. Step 3

    See the SMTP outcome

    We show you exactly what the receiving server said - the code, status and any text.

What you'll learn

  • →Whether the mailbox accepts mail at all
  • →The real SMTP response code and enhanced status
  • →The exact text the receiving server returned
  • →Which sending IP the message went out from

When to use it

  • →Confirm a new mailbox or alias can receive mail
  • →Check whether a domain accepts mail at its MX
  • →Reproduce and diagnose a delivery failure
  • →Sanity-check delivery after a DNS or MX change

Frequently asked questions

Is the test email tool free?
Yes. It is free and needs no account - daily limits apply per address and per network.
Can I customise the message?
No. The content is fixed to prevent abuse, and it carries a permanent one-click opt-out for the recipient.
Does “accepted” mean it reached the inbox?
No. A server accepting the message only means it took responsibility for it - it may still be filed as spam. See deliverability vs placement.
Why did my test fail?
Common causes are greylisting, a non-existent address, or the receiver blocking the connection. The SMTP response we show usually explains it.
Want a full authentication report instead?
Use the email diagnostics tool to grade a sender's SPF, DKIM, DMARC, TLS and blocklist health.