Know when a domain accepts every address
Some mail servers say yes to any address, real or not. We detect them and mark the address Risky with the reason, instead of guessing Deliverable.
- 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
Ask about a made-up mailbox
For a domain we haven't seen, we ask the server about a random address that cannot exist there.
- 02
Watch the answer
If the server accepts it, the domain accepts every address. We remember the answer for that domain.
- 03
Label it honestly
Real and fake addresses look the same there, so we mark them Risky.
What to do
What to do with these addresses
Every result comes with the reason, so you can decide row by row.
Send with care
Catch-all addresses often deliver. Send in smaller batches and watch bounces.
Keep them separate
Filter Risky rows so catch-all contacts go in their own campaign.
Add more signals
Use engagement history to decide which catch-all contacts are worth it.
Related checks
Part of all six checks
Every address goes through all of them, in order.
FAQ
Catch-all detection 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.