How to send OTP emails that arrive fast and stay secure
How long a one-time code should live, how to store and rate-limit it, and how to write the email so people sign in within seconds.
Developers and API
Send transactional email from Node.js, PHP, Python, Laravel and WordPress: OTP codes, verification and password-reset emails done safely.
How to send email from Node.js with an HTTP API
Send verification codes, receipts and notifications from your own domain in Node.js with one authenticated request. No packages, with timeouts and retries.
What is transactional email? Examples and how it works
Transactional email is the mail your app sends because a person did something. See real examples, how it differs from newsletters, and how to send it well.
WordPress not sending email? How to fix it for good
Why WordPress contact forms and password resets never arrive, and how to fix it with SMTP or an email API, SPF and DKIM, and a proper test.
Put it into practice on your own domain
Add your domain, publish the DNS records we generate, and start sending or receiving. Tell us what you need and we will set up a trial.