Mailcow

Overview
Mailcow on OneCloudPlanet — a modern Dockerized mail stack: SOGo webmail, Rspamd antispam, DKIM and a friendly admin panel. The sweet spot for 5–100 mailboxes.

What is Mailcow?
An all-in-one open source mail server: Postfix, Dovecot, Rspamd and SOGo assembled into a ready stack with a web admin panel.

Why Mailcow on OneCloudPlanet?
Port 25 open + PTR: mail delivers without third-party relays.
Recommended configuration: 2 vCPU / 4–6 GB RAM. See pricing.
No per-mailbox fees: the whole team for the price of one server.
DKIM out of the box: the panel generates keys — just add DNS records.

How to launch
1) Sign in at console.ocplanet.cloud
2) Open Marketplace and choose Mailcow
3) Pick a configuration and location
4) Point your MX record to the server and request a PTR record from support
5) Configure SPF/DKIM/DMARC and create mailboxes

Post-deploy checklist
• Request a PTR record via support
• Add SPF/DKIM/DMARC records from the Mailcow panel
• Create mailboxes and connect clients (IMAP/SMTP)
• Enable scheduled backups

FAQ
Mailcow or Zimbra? Mailcow — if you need mail only: lighter and simpler. Zimbra — if you need calendars, contacts and documents like Workspace.
Resource needs? 2 vCPU / 4–6 GB covers dozens of mailboxes.