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 wp pl address (wp.pl, o2.pl)? Matches the domain part against wp-pl'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 wp pl 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...