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Email list sampler

Bought a list or inherited one? Paste it in. We check a random sample of up to 200 and estimate how much of the whole list is dead.

Checking a random sample...

Why sample first?

A random sample of a few hundred addresses tells you roughly how a list will behave, before you spend on verifying all of it, or before you risk a sending domain on it. If the sample shows a lot of dead domains, the full list will be worse once mailbox-level checks run.

Next: verify the full list or see what it would cost.

How it works

Drop a CSV here, or paste your emails

q4-agency-leads.csv4,820 rows

[email protected]
[email protected]
[email protected]
[email protected]
…

Verify list

Add your emails

Upload a CSV, paste a list, or send addresses from your own tools. Your other columns stay untouched.

Checking your list2,990 of 4,820 done

We check every address

Thousands of addresses are checked in minutes. Watch the results arrive, or close the tab and come back.

Email	Verdict	Why
[email protected]	deliverable	Mailbox exists
[email protected]	risky	Shared inbox
[email protected]	risky	Accepts every address
[email protected]	undeliverable	Mailbox not found
[email protected]	undeliverable	Typo in the domain