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From a raw listto a safe send.
No email is sent during a check. The free plan includes 100 checks a month.
No email is sent during a check. The free plan includes 100 checks a month.
Learn what each category means, and when to keep, review, or remove an address.
§ 1
Why it matters
A check gives you evidence about an address. Your policy decides what to do with it.
Four categories, one score, and the reasons behind them.
§ 2
How it works
Valid: the mail server accepts the mailbox. Risky: it may deliver, but something is wrong, such as a catch-all domain or a full inbox. Invalid: it will bounce. Unknown: the server did not answer clearly.
§ 3
What you get
Table 3 · The four categories
| Category | Meaning | Usual action |
|---|---|---|
| valid | The mailbox exists and accepts mail. | Keep |
| risky | It may deliver, but a signal lowers the score. | Review |
| invalid | The address will bounce. | Suppress |
| unknown | The mail server did not give a clear answer. | Check again later |
§ 4
In practice
Case 4.1
Role addresses
Addresses such as info@ or sales@ often reach a team, not a person. They are flagged so you can decide.
Questions
A valid address can still be disposable, a role account, or on a spam-trap domain. These lower the score and can turn safe to send off.
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