Features:
- Catch-All Email: Forward unmatched emails for a domain to a single address
- Plus-Addressing: Enable user+tag@domain.com delivery with configurable delimiter
- Pattern Forwarding: Wildcard and regex-based email forwarding rules
Implementation:
- New database models: CatchAllEmail, EmailServerSettings, PlusAddressingOverride, PatternForwarding
- New UI pages with AngularJS controllers
- Backend methods in mailserverManager.py with ACL permission checks
- Auto-generates /etc/postfix/virtual_regexp for pattern rules
- Menu items added under Email section
