Email deliverability tips, developer guides, and best practices for transactional email.
Most email APIs charge extra for multiple sending domains. Here's how to manage multiple domains with one API key and one bill — and why it matters for developers.
What is an email sandbox? How to test emails in development without accidentally emailing real users. Compare free options: built-in sandbox, local SMTP, and cloud-based tools.
MailHog hasn't been updated since 2020. Here are the best alternatives for local email testing in 2026, including Mailpit, SendPigeon, MailCrab, and more.
Complete guide to sending transactional emails from Hono. Covers every runtime — Node.js, Cloudflare Workers, Bun, and Deno — with code examples, validation, templates, webhooks, and testing.
Build beautiful HTML emails with our visual editor. Export to HTML or React Email. No signup required.
A technical deep-dive into email headers. Learn what each header does, how to read raw email data, and how headers affect deliverability.
Send emails, manage templates, stream logs, and run a local dev server - all from the command line.
npx @sendpigeon-sdk/cli dev - one command, no Docker, no config. Catch emails locally with Node.js, Python, PHP, Go, or any SMTP client.
Hard lessons learned building SendPigeon on top of AWS SES, and why email authentication is harder than it looks.
A developer's guide to diagnosing and fixing email deliverability issues. From authentication problems to content triggers—find out why your emails aren't reaching the inbox.
A practical guide to sending transactional emails from Next.js using the SendPigeon SDK. Password resets, welcome emails, templates, and best practices.
Send transactional emails from Node.js using the SendPigeon SDK. Setup, error handling, templates, and production best practices.
A practical checklist for evaluating transactional email APIs. Authentication, deliverability, DX, pricing models, and the features that actually matter.
How to evaluate email API pricing when you're an indie developer or agency with several low-traffic projects. A practical guide to avoiding overpaying for bundled capacity.
A hands-on, step-by-step guide to configuring email authentication. Copy-paste DNS records, provider-specific instructions, and troubleshooting tips.
Learn the key differences between transactional and marketing emails, when to use each, and why they need separate infrastructure.
A practical checklist to ensure your transactional emails actually reach the inbox. Authentication, content, infrastructure—everything you need.
A developer-friendly explanation of email authentication. What these acronyms mean, why they matter, and how to set them up correctly.
Send targeted marketing emails to your audience with contact management, templates, and tracking—all from the same platform as your transactional emails.