2 services carry this tag in their source record. Tags come from the provider, not from us — a tag is a claim about what the service does, not proof that it does it well.
Is this a xtra address (xtra.co.nz)? Matches the domain part against xtra's consumer mailbox domains and reports personal-vs-business, so CRM and lead rules can treat free-webmail signups differently. $0.01 per check.
Bulk is xtra address: up to 20 emails in one call, processed concurrently, results in input order with a per-item error field and a failure count. Same answer per item as the single endpoint. Batch enrichment for agents...