Double opt in email: how it works and why
How a double opt in email flow works: sign a confirmation link, verify the click, record the consent on the contact, and never mail anyone who did not confirm.
Newsletter API: send broadcasts from your code
Send a newsletter over an API in six calls: create a topic, add contacts with consent, build a segment, create the broadcast, pass the gate and read the report.
Transactional vs marketing email: how to send each
What separates transactional email from marketing email — the trigger, consent, unsubscribe headers and reputation — and how to send both from one API.
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