- Use correct Dovecot namespace (separator='.', prefix='INBOX.'):
folders are INBOX.Sent, INBOX.Drafts, INBOX.Deleted Items, etc.
- Quote IMAP folder names with spaces (e.g. "INBOX.Deleted Items")
- Add display_name and folder_type to folder list API response
- Fix SMTP for SSO: use local relay on port 25 (permit_mynetworks)
since Dovecot has no auth_master_user_separator for port 587
- Fix Sieve SASL PLAIN auth to use clean RFC 4616 format
- Handle ManageSieve unavailability gracefully with helpful logging
- Update frontend to show clean folder names and correct icons
- Auto-prefix new folder names with INBOX. namespace
Replace SnappyMail link with a custom Django webmail app that provides:
- Full IMAP/SMTP integration (Dovecot + Postfix) with master user SSO
- 3-column responsive UI matching CyberPanel design system
- Compose with rich text editor, attachments, reply/forward
- Contact management with auto-collect from sent messages
- Sieve mail filter rules with ManageSieve protocol support
- Standalone login page for direct webmail access
- Account switcher for admins managing multiple email accounts
- HTML email sanitization (whitelist-based, external image proxy)
- Draft auto-save and per-user settings
