SMTP-verify company email addresses (SPENDS TOKENS)

Verifies the business email on each lead you pass, up to 2,000 per call. Included in every plan at no charge; a re-check inside 90 days returns the cached verdict. Runs as a background job: the call returns jobId at once; poll GET /api/verification/job/{jobId} until status is completed, or subscribe to job.completed. The finished job carries summary (verified, catch_all, unknown, invalid, no_email, failed, cached). Rate limit: 30,000 ids a minute on Growth, up to 150,000 on Agency.