Transactional email
Created by CodeCraft LLCBuild, advise on, and review transactional and product email
Product and technology names are trademarks of their respective owners, used only to identify what this skill covers. CodeCraft LLC is not affiliated with or endorsed by them.
by Jace (@jamick)v1.1.0 · updated 2026-10-03Report copyright infringement
Description
Build, advise on, and review transactional and product email — provider choice and integration (Resend, Postmark, Amazon SES, SendGrid, Cloudflare Email Service), domain authentication (SPF, DKIM, DMARC alignment), mailbox-provider sender requirements, separating transactional and marketing streams, idempotent sending with an outbox, retries, bounce/complaint webhooks and suppression lists, one-click unsubscribe, templates (React Email/MJML) with plain-text parts, localization, security of links and content, abuse prevention on send endpoints, and local testing. Use whenever the app sends email (verification, password reset, receipts, notifications, digests), the user configures DNS for email, emails land in spam, or reviews email-sending code.
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Changelog
v1.1.0Oct 3, 2026Latest
Changed
- Checked against the official documentation (October 2026).
- Added the enforced mailbox-provider sender rules with numbers: Gmail/Yahoo (February 2024) and Microsoft (May 5, 2025) - authentication with alignment, one-click unsubscribe within 2 days, spam rate under 0.3%, Microsoft's outright 550 5.7.15 rejections.
v1.0.1Oct 3, 2026
Changed
- Added a trademark notice to the README.
v1.0.0Oct 2, 2026
Added
- First release.