Aliases (Email → Configuration → Aliases):
sales@example.com → alice@example.com, bob@example.com(group alias)@example.com → catch@example.com(catch-all — use sparingly, spam magnet)- Aliases can target external addresses; SPF/DMARC alignment will break unless you enable Rspamd's SRS rewriting (on by default in modern Mailcow).
Mailbox ACLs: Each mailbox can be granted permission to:
- Spam-train / ham-train messages
- Manage app passwords (for IMAP clients that don't speak OAuth)
- Edit their own Sieve filters
- Modify TLS policy
- Use SMTP from external IPs
Strip permissions you don't want users to touch — this prevents accidental TLS downgrades that nuke deliverability.
🎯 Tip: for shared mailboxes (support@), create a real mailbox and grant other users Shared folder access via SOGo. Avoid forwarding-to-many aliases for inbound — replies break threading.
Sign in to keep track of what you have read.