Email APIs — SendGrid, Resend, and Transactional Email
Send transactional emails from your app using modern email APIs — setup, templates, deliverability, and avoiding the spam folder.
Your app needs to send email. Welcome emails when users sign up. Password reset links. Order confirmations. Payment receipts. Notification digests. Email is the most reliable way to reach your users outside of your app, and every production application sends it.
But you can't just use Gmail's SMTP server and call it a day. Real transactional email requires a dedicated service — one designed for reliability, deliverability, and scale. That's where email APIs come in.
Transactional vs. Marketing Email
These are fundamentally different things, and the distinction matters:
Transactional email is triggered by a user action. Someone signed up — send a welcome email. Someone bought something — send a receipt. Someone requested a password reset — send the link. These are 1:1, expected,
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