docker-mailserver — system requirements

Self-hosted, single-container mail server (SMTP, IMAP, LDAP, anti-spam, anti-virus) configured entirely via files, no SQL database. · website · repository

Minimum RAM

512 MB

“512MB RAM”

Scope: Minimum for general Docker deployment; requires avoiding services like ClamAV (disabled by default) to run within this RAM ceiling · official source · retrieved 2026-08-16

Recommended RAM

2 GB

“2GB RAM”

Scope: Recommended for general Docker deployment, with swap enabled for the container · official source · retrieved 2026-08-16

Minimum CPU cores

1 core

“1 vCore”

Scope: Minimum for general Docker deployment; requires avoiding services like ClamAV (disabled by default) to run within the stated RAM ceiling · official source · retrieved 2026-08-16

Recommended CPU cores

1 core

“1 vCore”

Scope: Recommended for general Docker deployment, with swap enabled for the container · official source · retrieved 2026-08-16

External services

No required external services (source)

Container

Image: ghcr.io/docker-mailserver/docker-mailserver · compressed size (amd64): 396 MB · architectures: amd64, arm64 · source, retrieved 2026-08-16

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