Bulk email verification

Verify every list with enterprise-grade discipline.

FirstPass gives your team a private verification command center: pre-filtering, Reoon verification, shared cache, Sheets sync, and clean exports designed to reduce paid API calls before they happen.

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Your provider API keys
Google Sheets sync

FirstPass verification dashboard showing valid, invalid, and catch-all email results

From upload to verified export

A focused workspace for cleaning lists before paid provider credits are spent.

Four-step email verification workflow from upload to export

1
Bring in the list
Paste addresses, upload CSV or Excel, or connect Google Sheets. FirstPass keeps the workflow direct and repeatable.
2
Screen before spending
Syntax, MX records, disposable domains, cache, and catch-all signals reduce waste before your Reoon credits are used.
3
Verify with Reoon
Connect your Reoon API key. FirstPass runs power-mode verification and normalizes results into clean categories.
4
Deliver clean outputs
Export CSV, Excel, or JSON, or write status and score back to Google Sheets for immediate follow-up.

Google Sheets

Attach a sheet. Verify. Write results back.

Load emails from any column, run verification in the app, and sync status plus score back to the same spreadsheet rows: valid, invalid, catch-all, disposable, risky, and unknown.

Google Sheets connected to FirstPass with status and score syncing back

Smart pipeline

Multiple checks before your API gets involved

Syntax, MX, disposable domains, catch-all signals, cache, format intelligence, then provider verification. FirstPass is built to reduce waste before a paid lookup happens.

Seven-stage FirstPass verification pipeline from syntax to API verify

Built for list hygiene at scale

Everything you need to verify in bulk while keeping provider spend disciplined.

Pre-filter before you pay

Syntax, MX, disposable, cache, and catch-all checks reduce obvious waste before provider credits are used.

Shared verification cache

Hashed result cache helps repeated list work finish faster while avoiding unnecessary repeat lookups.

Domain format intelligence

Learns domain-level email patterns so future checks can lean on known structure before paid verification.

Reoon verification

Connect your Reoon API key and run power-mode verification with bulk support and daily credit tracking.

Google Sheets sync

Load emails from a sheet, verify them, then write status and score back to the same rows.

FirstPass scheduler queue for large overnight verification jobs

Scheduler for big lists

Queue large batches with daily limits and active hours so verification can run in controlled windows.

Clear pricing

Start with a 7-day trial, then choose the plan that fits your verification volume.

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FirstPass pricing plans for trial, monthly, and team subscriptions

Ready to verify with more control?

Start a 7-day trial and run your next list through a focused verification workspace.

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