High bounce rates (> 2%) and spam trap hits degrade IP and domain reputation instantly. Implementing automated list hygiene at the point of capture preserves high inbox placement.
1. The Four-Stage Email Verification Pipeline
- RFC 5322 Syntax & Regex Check: Validates correct address format, domain syntax, and character limits.
- DNS MX & A Record Resolution: Queries authoritative nameservers to confirm the domain possesses active mail exchangers.
- Disposable Email (DEA) & Role-Account Filtering: Blocks temporary burner inboxes and generic role addresses (sales@, info@).
- Real-Time SMTP Handshake (No Deliver): Issues
HELO/EHLOandRCPT TOcommands to verify mailbox existence without sending content.