Postrun

Transactional and marketing email, with a delivery log you can actually debug.

Start here:

• Quickstart — your first email in about two minutes.
• The sandbox sender — send before you own a domain, with no DNS change and nobody else’s permission.
• Migrating — moving from another provider. Read step 2 before your first send; it is the step everybody skips and the one that costs.
• API reference — endpoints, errors, and how to verify a webhook.

What is different here

A domain whose DNS lives with us verifies with a button. No DKIM records to paste into somebody else’s control panel, and nothing to re-paste on the next key rotation. Point a sending domain’s nameservers at us once and that step never comes back.

The log is the product. Every message carries its full timeline — accepted, sent, delivered, opened, bounced — including the receiving server’s own diagnostic text. That is what answers “why did this not arrive”, and it is the thing you will actually use.

Any language

The API is plain JSON over HTTPS with one header of authentication, and the reference is complete. If your framework already speaks SMTP, that works too with nothing to install.