Bulk email verification without losing the row

Bulk email verification checks multiple eligible addresses in a managed job rather than individually. RefreshList separates assessment, credit reservation, provider processing, and categorized downloads. The current upload limit is 100 MB and 1,000,000 emails per file; purchased credit balances can fund multiple files without changing that per-file limit.

Last updated 2026-09-14. Read the scope and limitations before applying a result.

Key points

Pack size is not file capacity.
Review duplicates first.
Keep stable batch identifiers.

Detailed explanation

Split larger databases into traceable batches. Follow provider progress and rechecks instead of uploading the same batch again while waiting.

Example

300,000 credits can fund several files, not one 300,000-row upload.

How RefreshList handles it

Workspace and bearer-key API jobs share provider-readiness checks and credit rules.

Limitations

Timing depends on receiving systems and provider availability; there is no fixed completion guarantee.

Methodology and sources

Product behavior is described from the current RefreshList implementation and provider contract. Protocol context should be checked against the applicable standards and provider documentation. This page does not create a benchmark or certification.