Service Architecture Reference
docker-mailserver consists of the following services:
| Service | Component | Role |
|---|---|---|
| MTA | Postfix | SMTP (send/receive) |
| MDA | Dovecot | IMAP/POP3 (mailbox access) |
| Web | Admin + Roundcube | Management UI and webmail |
| Filter | Rspamd | Spam filtering |
| SSL | — | Certificate generation |
| Database | MySQL/PostgreSQL | User and configuration data |
| Redis | Redis | Caching and sessions |
| Unbound | Unbound | DNS resolver for filter |
| Fetchmail | Fetchmail | External mail retrieval (optional) |
Persistent Volumes
| Volume | Purpose |
|---|---|
data-db |
Database data (users, aliases, ...) |
data-mail |
User mailboxes (maildir) |
data-tls |
TLS certificates and keys |
data-filter |
Rspamd data and statistics |
data-redis |
Redis data |
data-spool |
Postfix queue and spool |
Volume Mounts by Service
- db:
data-db:$DB_DATA_DIR(/var/lib/mysqlor/var/lib/postgresql) - mta:
data-tls:/etc/postfix/tls:ro,data-spool:/var/spool/postfix - mda:
data-mail:/srv/vmail,data-tls:/etc/dovecot/tls:ro - web:
data-tls:/opt/admin/tls:ro(required for mobileconfig generation) - filter:
data-filter:/var/lib/rspamd - redis:
data-redis:/data - SSL:
data-tls:/media/tls:rw
For an overview of how these components work together, see Architecture.