Curriculum Learn by topic Each card opens a written guide or product page you can keep.
Build a high-quality email list List quality beats list size. Learn capture hygiene, verification at signup, and how to protect sender reputation.
Key topics
Why list quality matters more than size Common list-building mistakes that hurt deliverability How verification reduces hard bounces Open resource Two-step verification in practice Verify at capture, then re-verify aged segments before major sends — a durable pattern for product and marketing teams.
Key topics
Capture-time API checks Bulk re-verification before campaigns Documented risky-address policy Open resource Peak-season deliverability checklist Protect reputation before BFCM and other volume spikes: clean lists, authentication, and engagement-aware sends.
Key topics
Pre-send list hygiene SPF, DKIM, and DMARC basics Suppress undeliverable and chronically unengaged contacts Open resource Sender requirements & authentication Mailbox providers expect authenticated mail and healthy complaint rates. Pair verification with auth hygiene.
Key topics
Alignment tips for SPF, DKIM, DMARC Why authenticated mail can still miss the inbox Permission and engagement as reputation signals Open resource Risky emails: disposable, role, accept-all Not every non-deliverable result is a hard fail. Build channel-specific policies for edge cases.
Key topics
When to allow role addresses Disposable inbox policy Accept-all uncertainty Open resource Form-level validation with the API Wire POST /api/v1/verify into signups so typos and disposable inboxes never enter the product.
Key topics
Real-time result handling UX for correction prompts Logging reason codes for support Open resource