RELAY COLLECTIONS

Field notes for
less permanent mail.

Practical guides on private inboxes, agent-friendly email, verification testing, and infrastructure that stays out of your way.

LATEST GUIDES

All collections

html sanitization

Why Email HTML Sanitization Matters

HTML email can carry scripts, tracking resources, deceptive links, and malformed markup. Learn how sanitization, sandboxing, CSP, and careful testing reduce risk.

Read guide ->Relay team