System Requirements¶

What you need before deploying Mailyte — hardware, software, and network.

Hardware Requirements¶

Minimum (Development / Testing)¶

Recommended (Production, up to 50k emails/day)¶

Large Scale (100k+ emails/day)¶

Note: Disk requirements grow with user count and retention policy. Budget roughly 1 GB per 100 active mailboxes as a starting point, then monitor actual usage.

Memory Breakdown by Service¶

Each service has its own memory needs. Here's where the RAM goes:

Total: 2.6 GB minimum, 6.4 GB recommended.

Software Requirements¶

Operating System¶

Docker¶

# Check your versions
docker --version
docker compose version

Install Docker if needed:

# Ubuntu / Debian
curl -fsSL https://get.docker.com | sh
sudo usermod -aG docker $USER
# Log out and back in

# Verify
docker run hello-world

Additional Tools¶

These aren't required but make life easier:

Network Requirements¶

Ports¶

These ports need to be open (inbound):

Warning: Never expose ports 8080 (health monitor), 9090 (Prometheus), or 3000 (Grafana) to the public internet without authentication.

DNS Records¶

Before deployment, set up these DNS records:

Outbound Connectivity¶

Your server needs to reach:

• Port 25 outbound (SMTP delivery to other mail servers)
• Port 53 outbound (DNS lookups)
• Port 443 outbound (Let's Encrypt, package updates, Docker pulls)

Note: Some cloud providers (AWS, GCP, Azure) block outbound port 25 by default. You'll need to request an exception or use a relay service like SES or SendGrid.

Disk Layout Recommendations¶

For production, separate your data onto different volumes:

/                   20 GB   (OS and containers)
/var/lib/docker     30 GB   (Docker images and layers)
/var/lib/mysql      50 GB+  (Database — size depends on usage)
/var/mail           100 GB+ (Mail storage — grows over time)
/var/log            10 GB   (Logs)

Use SSDs for everything. Mail storage can use slower storage if cost is a concern, but MySQL and Redis should always be on fast disks.