List verification
List verification by EmailPal
Built-in list verification with catch-all detection via SMTP probing (RCPT TO only). Six verdicts, daily instant-check allowances, REST and MCP.
What it is
EmailPal verifies addresses before you send, so a catch-all domain or a disabled mailbox does not become a bounce on a warmed IP.
The distinctive check: we ask the receiving server about a mailbox that cannot exist, then interpret what it says about your real contact. If the fake address is accepted, the domain is a catch-all and a "valid" on the real address does not mean what you think.
Nothing is delivered. The probe is RCPT TO only.
Six verdicts
| Verdict | Meaning |
|---|---|
| Valid | The server rejected a impossible mailbox, then accepted yours. Deliverable. |
| Catch-all | The domain accepts anything. Do not treat as confirmed. |
| Unknown | The server would not say. |
| Role | An address like info@ or support@ — often filtered, often shared. |
| Full mailbox | The mailbox exists but cannot take mail right now. |
| Disabled | The mailbox is not accepting mail. |
A longer walkthrough: Six verification verdicts and Catch-all detection.
Pricing and allowances
Verification is included on every plan, with a daily instant-check allowance:
| Plan | Instant checks / day |
|---|---|
| Starter | 500 |
| Growth | 1,500 |
| Scale | 4,500 |
Extra capacity is sold in blocks of 500 checks/day per month. Upload verification and API/MCP use the same engine.
How to run a list
- Open Lists (or upload at send time where the dashboard offers it).
- Wait for verdicts. Catch-alls are the ones to drop or handle differently.
- Send only what you are willing to put on a warmed mailbox.
API: POST /api/public/v1/verify and list endpoints. MCP: verify_list.
FAQs
Does verification send an email to the prospect?
No. No DATA, no message, no inbox notification from us.
Why not trust a "valid" from another vendor?
If they skipped the impossible-mailbox probe, catch-alls look valid. Those bounce later, on your reputation.
Is this available in the free trial / before a plan?
Daily allowances ride on the paid plans. The product page is List verification.
Need More Help?
Open a ticket if a whole domain comes back unknown — that is often a server that greylists probes, not a bug in your CSV.