Question 1

What is a bulk email checker?

Accepted Answer

A bulk email checker validates a whole list of addresses in a single pass instead of one lookup at a time. Enrow's bulk email checker takes up to 5,000 emails per batch and returns a deterministic valid or invalid verdict for each, so you can scrub a scraped, imported, or aging list before it ever reaches your CRM or your next send.

Question 2

When should I run a bulk email checker?

Accepted Answer

Any time a list has gone stale or arrived from outside your funnel: a scraped export, a purchased file, an old newsletter base, or contacts that have sat untouched for months. Running the whole list through the bulk email checker first strips out the dead and mistyped addresses, so only clean, deliverable contacts get imported.

Question 3

How many emails can I check in one batch?

Accepted Answer

Up to 5,000 addresses per POST to /email/verify/bulk. Need to clean more than that? Split the list across several batches — each returns its own id and its own results — and let them process in parallel. Because nothing holds a connection open, list size never blocks you.

Question 4

Does the bulk email checker handle catch-all domains?

Accepted Answer

Yes. Instead of tagging catch-all domains 'risky' and leaving them in your list, Enrow's bulk email checker resolves them deterministically and returns a definitive valid or invalid verdict. A whole batch comes back clean, with no ambiguous rows left for you to sort out by hand.

Question 5

How does the bulk email checker API work?

Accepted Answer

POST your addresses as a verifications array to /email/verify/bulk with your x-api-key header. The API responds immediately with an id, credits_used, and an estimated_duration, then processes the batch asynchronously. Per-address results arrive at your webhook — set settings.webhook in the request — or from the matching GET endpoint once the batch finishes. Full reference at docs.enrow.io.

Question 6

Is the bulk email checker synchronous or asynchronous?

Accepted Answer

Asynchronous. You never hold a connection open while a list processes. Submit the batch, get an id back in the same response, then collect the valid or invalid results by webhook or GET when Enrow is done. That is exactly what makes checking thousands of addresses at once practical.

Question 7

How much does the bulk email checker cost?

Accepted Answer

0.25 credit per email checked, whatever the batch size. Credits are shared across all Enrow APIs, plans start at $17, and you begin with 50 free credits. You pay only for the addresses you actually check.

Question 8

Is the bulk email checker GDPR and CCPA compliant?

Accepted Answer

Yes. Enrow processes professional contact data in line with GDPR and CCPA, and a DPA is available on request. Authentication is a single x-api-key header, so you can start cleaning lists with your free 50 credits right away.

1	# 1. Launch a search
2
3	curl -X POST https://api.enrow.io/email/verify/bulk \
4	-H "x-api-key: YOUR_API_KEY" \
5	-H "Content-Type: application/json" \
6	-d '{
7	"verifications": [
8	"john.doe@acme.com",
9	"jane.roe@globex.com"
10	],
11	"settings": {
12	"webhook": "https://yourapp.com/webhook"
13	}
14	}'

1	# 2. Webhook fires when ready:
2
3	{
4	"id": "0cf517bc-16e8-45bc-b967-ab9116b3c804",
5	"results": [
6	{ "email": "john.doe@acme.com", "qualification": "valid" },
7	{ "email": "jane.roe@globex.com", "qualification": "invalid" }
8	]
9	}
10
11	# Or poll the result:
12
13	GET https://api.enrow.io/email/verify/bulk?id={batch_id}

1	curl -X POST
2	https://api.enrow.io/email/find/single -H "Content-Type: application/json" -H "x-api-key: YOUR_API_KEY" -d '{
3	"fullname": "John Doe",
4	"company_domain": "example.com"
5	}'

The bulk email checker that cleans whole lists at scale

One API. One endpoint. Single and Bulk.

bulk email checker

Async-first. Webhook-ready.

Async by default

Metadata passthrough

Webhooks

Deterministic verification

Track everything. Via API or in the dashboard.

Account endpoint

In-app dashboard

SDKs, native integrations, or raw HTTP

SDKs

Native integrations

HTTP from anywhere

Bulk email checker — clean your list at scale

First request in under 10 minutes