Email List Hygiene

List quality is a direct input to deliverability. Inbox providers observe your sending behavior, bounce rate, complaint rate, engagement, and use it to score your domain reputation. A clean list with genuine subscribers outperforms a large, stale list every time.

Related skills: compliance/SKILL.md (consent requirements, GDPR right to erasure), monitoring/SKILL.md (how to track bounce and complaint rates over time)

Email Validation

Validate email addresses before they enter your system, not after the first failed send.

Why Validation Matters