Hey everyone,
So cPanel's spam filtering setup has been an absolute nightmare lately. Between over-aggressive policies and zero flexibility, my legitimate business emails are getting flagged or dropped — and it's genuinely costing me clients.
I've been doing some research and Mailcow keeps coming up as a solid self-hosted alternative. Docker-based, open source, comes with SOGo/Roundcube, Rspamd, and lets you actually control your spam policies without jumping through hoops.
A few things I'm trying to figure out before I commit:
- How painful is the migration from cPanel mail to Mailcow? (Accounts, filters, aliases, etc.)
- Is managing your own mail server in 2026 worth the headache, or is deliverability still a fight with big providers (Gmail, Outlook)?
- Any gotchas I should know about — reverse DNS, SPF/DKIM/DMARC setup, blacklists?
- Is Mailcow stable enough for business-critical email, or should I be looking at something like iRedMail or Postal instead?
My setup: ~5 domains, maybe 20–30 users, mostly transactional + client comms. Nothing crazy at scale.
Would love to hear from anyone who's been down this road. Was it worth it? Any regrets?