Email Validation Glossary
Essential terms and definitions for understanding email validation and deliverability
What is a catch-all email address? Learn how catch-all domains work, how to detect them, and why they affect your email deliverability.
What is a soft bounce in email? Learn the difference between soft and hard bounces, why they happen, and how to fix them to improve deliverability.
Email poisoning is a deliberate tactic to ruin your sender reputation and cause deliverability issues. Learn what it is, how it works, and how to defend against it.
A catch-all email address accepts all messages for a domain—even fake ones. Find out how it works, why it matters for deliverability, and how to detect it.
What is an SMTP ping? Discover how it works, why it's used in email verification, and how it helps detect invalid or fake email addresses.
List hygiene is the practice of keeping your email list clean and active. Learn what it means, how to do it, and why it improves open rates and ROI.
A spam trap is a hidden email used to catch bad senders. Learn how they work, why they ruin deliverability, and how to avoid them with proper list hygiene.
Understanding disposable email addresses, their impact on your campaigns, and how to detect and handle them