Poste.io

Infrastructure1024MB+ RAM

All-in-one mail server (SMTP, IMAP, POP3, webmail, admin UI) in a single container

Download Server Compass View Documentation

infrastructureemailposteioopen-sourceself-hosteddocker

Deploy Poste.io in 3 Steps

Connect Your VPS

Add your server credentials to Server Compass

Select Poste.io

Choose from our template library

Deploy & Configure

Fill in settings and click Deploy

No Docker knowledge required

After Deployment

After deploying Poste.io with Server Compass, complete these steps to finish setup

Visit http://YOUR_SERVER_IP:{{PORT}} and complete the setup wizard - create the admin account and the first domain

Generate DKIM keys in the admin UI under Server settings → DKIM and publish the resulting TXT record in DNS

Configure SPF and DMARC TXT records for the domain

Add the mail protocol ports (25/465/587/993/995) to the compose file and redeploy, then open them in your firewall

Send a test email and run it through https://www.mail-tester.com to verify deliverability

Need help? Check out our documentation for detailed guides.

Poste.io FAQ

Common questions about self-hosting Poste.io

How do I deploy Poste.io with Server Compass?

Simply download Server Compass, connect to your VPS, and select Poste.io from the templates list. Fill in the required configuration and click Deploy. The entire process takes under 3 minutes.

What are the system requirements for Poste.io?

Poste.io requires a minimum of 1024MB RAM. We recommend a VPS with at least 2048MB RAM for optimal performance. Any modern Linux server with Docker support will work.

Can I migrate my existing Poste.io data?

Yes! Server Compass provides volume mapping that allows you to import existing data. You can also use standard Poste.io backup and restore procedures.

How do I update Poste.io to the latest version?

Server Compass makes updates easy. Simply click the Update button in your deployment dashboard, and the latest Poste.io image will be pulled and deployed with zero downtime.

Is Poste.io free to self-host?

Poste.io is open-source software. You only pay for your VPS hosting (typically $5-20/month) and optionally Server Compass ($29 one-time). No subscription fees or per-seat pricing.