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Quick answer: Postal needs Docker support, at least 2GB RAM (more comfortably 4GB), a dedicated IP, Port 25 access, and full root access to deploy its container stack. Because it runs MariaDB and RabbitMQ alongside the mail server itself, undersizing RAM is the most common setup mistake.

What to Look For

Docker Support

Postal is distributed as Docker containers, so full root access to install Docker is required.

Enough RAM

MariaDB and RabbitMQ running alongside Postal's own services benefit from 4GB RAM or more.

Dedicated IPv4 & Port 25

Required for Postal's direct outbound mail delivery.

NVMe or Fast SSD

Faster storage keeps MariaDB and the RabbitMQ queue responsive under load.

Frequently Asked Questions

How much RAM does Postal need?

2GB is a functional minimum for small deployments; 4GB or more is more comfortable given its Docker container stack.

Is Docker required to run Postal?

Yes, Postal is officially distributed as Docker containers.

Does Postal need a dedicated IP?

Yes, for sending reputation independence, a dedicated IPv4 address is strongly recommended.

Which VPS For Life plan suits Postal?

Standard or Advanced for most deployments, with Pro for higher sending volume.

Related Pages

VPS for Postal

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Postal vs PowerMTA

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VPS for Docker

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Port 25 VPS

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Deploy Postal on a Properly Sized VPS

Docker-ready, Port 25 open — starting at $9.95/month.

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