Self-hosted SMTP relay for email.
Send email from your own infrastructure — an HTTP and SMTP sending API, webhooks for delivery events, no dashboard standing between you and the send.
For anyone who wants deliverability without renting it: transactional mail a recipient is already expecting, apps that would rather run their own relay than integrate a SaaS sending provider, teams done paying rent on a problem they mostly don't have.
PostRider handles:
- a self-hosted SMTP relay you run and control
- an HTTP and SMTP sending API
- webhooks for delivery events
- no dashboard, no reputation score, no warm-up schedule, no pricing tier
- no JavaScript, anywhere
Ship the email. Trust that the people who want it will find it.
- Deliverability Is Overrated
- Why Run Your Own?
- Ship the Email
- Installation
- API (HTTP & SMTP sending)
- Webhooks
- Statuses & Lifecycle
- Development
- Deployment & Operations
- History
- Contributing
- License
Not the concept. The panic.
Somewhere along the way, "send an email" became a SaaS category. Dashboards. Reputation scores. Warm-up schedules. Pricing tiers built around inbox placement. All of it makes sense if you're blasting newsletters at people who never asked. Most email isn't that. Most email is something a person is actually waiting for.
Take the clearest case: a password reset, sent to someone who signed up ninety seconds ago and is staring at their inbox right now. That person isn't a cold prospect. They're mid-task. They triggered the email. They want the email. If it's not in the inbox, they'll check spam without a second thought. The context does the deliverability work for you — you just have to stop getting in its way. And the same holds, to varying degrees, for most of the mail you send: notifications, receipts, updates, the message that lands because someone was expecting it.
So PostRider is a bet: run your own relay, keep it clean, do the fundamentals, and stop paying rent on a problem you mostly don't have. In real use, the bet holds. Mail lands.
Outlook is still Outlook and occasionally has opinions. So do the people you're paying to avoid it.
Because you can. That used to be reason enough. It still is. And it's JavaScript-free, which is its own kind of freedom, the relaxing kind.
Ship the email. Trust that the people who want it will find it. Then go spend your engineering time on your actual product instead of babysitting a sender score.
View the changelog.
Everyone is encouraged to help improve this project:
- Report bugs
- Fix bugs and submit pull requests
- Write, clarify, or fix documentation
- Suggest or add new features
MIT. See LICENSE.