About Email SDK
Email SDK is an open-source TypeScript library for transactional email. Its documentation describes one typed send() API for 23 email providers, with explicit routing, retries, and fallbacks. The core has zero runtime dependencies.
Leo maintains Email SDK through OpenCore.
Why campaigns matter to Leo
Leo said campaigns initially seemed unnecessary. After using them to reach Email SDK users, his view changed.
Sequenzy's most powerful feature is probably those campaigns. It seems useless at first but they are one of the most important things to send to your users.
Leo, Maintainer of Email SDK
The workflow Leo described
Leo pairs a campaign with a link to his calendar. Users can book time with him, and he uses those conversations to help them set up Email SDK for their use case.
The campaign, calendar link, one-to-one conversation, and setup help are the complete workflow Leo described.
Direct support from Sequenzy
Leo also highlighted the support he receives from Sequenzy's owner.
The owner is really active on X, really nice and helpful. He's the type of person to go out of his way to help you, so you get really good support!
For Email SDK, the value Leo reported is straightforward: campaigns help him reach users, a calendar link gives them a way to talk with him directly, and Sequenzy provides responsive support when he needs it.