Re-check what you accepted last year
Domains expire, get parked and drop their mail servers after signup. Send existing users to /v1/email/bulk and customer or workspace domains to /v1/domain/bulk, up to 10,000 per request, with results in the response.
The same checks, in bulk
Bulk results carry the decision, score, and flags for every entry, in the order you sent them.
Same checks as single requests
Every entry goes through the same check as /v1/email or /v1/domain. Call the single endpoint when you need the full facts for one result.
CSV in the browser
Upload a CSV or paste a sheet on the re-check page and export the decisions and flags next to your original columns.
Know what wasn't checked
Invalid entries come back marked INVALID_FORMAT, and rows the tool could not check stay marked in the export instead of disappearing.
Practical questions
Are bulk checks cheaper?
No. Each entry uses 1 credit, the same as a single check. Bulk saves requests, not credits.
Can guests use bulk?
No. Bulk endpoints need an account. The free Developer plan includes 1,000 credits a month.
Does a re-check guarantee deliverability?
No. EmailScore does not connect to the recipient's mail server. A re-check tells you which addresses and domains changed in ways worth acting on.
What should I do with uncertain results?
Review the flags and apply your own policy. Do not treat ALLOW as mailbox ownership proof or DENY as evidence that a person is fraudulent.
Re-check a list
Upload a CSV to re-check addresses, or call the bulk endpoints from a scheduled job.