Make sure the domain can receive email
Before we ask about a mailbox, we check that the domain exists and has a mail server. Dead and parked domains are caught here.
- Six checks on every address
- A plain reason with every result
- Slow servers never cost a second credit
- 200 free credits, no card
Examples
What it looks like in your results
Result rows with the category and the reason you will see.
How it works
How we detect it
This check runs on every address, as part of the same credit.
- 01
Look up the domain
We check that the domain exists in DNS.
- 02
Find the mail servers
We look up its MX records to see where mail should go.
- 03
Stop early if there are none
No mail server means mail will bounce, so we return Undeliverable.
What to do
What to do with these addresses
Every result comes with the reason, so you can decide row by row.
Remove these rows
Addresses on dead domains will always bounce.
Check old lists first
Companies shut down and domains expire, so older lists have more of these.
Related checks
Part of all six checks
Every address goes through all of them, in order.
Catch-all detection
Some domains say yes to any address, so no one can confirm the mailbox.
Learn moreFAQ
Domain and MX questions
Short answers about this check.
Still have a question? Talk to us.
Check your list before you send it
Start with 200 free credits. Pay per credit after that.