This commit resolves the issue where CyberPanel attempts to configure email/DKIM settings
even when email services were explicitly disabled during custom installation, causing
hostname SSL setup and website creation to fail with "No such file or directory: '/etc/postfix/main.cf'" errors.
Changes:
- Added emailServicesInstalled() utility function to check for /home/cyberpanel/postfix marker
- OnBoardingHostName(): Wrap email operations (issueSSLForMailServer, postfix commands) with checks
- OnBoardingHostName(): Allow hostname setup to complete without email services
- issueSSLForMailServer(): Add early return if email services not installed
- issueSSLForMailServer(): Verify /etc/postfix directory exists before operations
- issueSSLForMailServer(): Check /etc/postfix/main.cf exists before reading
- setupAutoDiscover(): Add early return if email services not installed
- setupAutoDiscover(): Check /etc/postfix/main.cf exists before accessing
- mailUtilities.configureOpenDKIM(): Verify main.cf exists before configuration
Impact:
- Hostname SSL setup now completes successfully without email components
- Website creation works correctly on custom installs without email
- No more file not found errors for /etc/postfix/main.cf
- Graceful degradation: operations skip email setup with log messages
Fixes: Custom installation hostname SSL 404 error
Fixes: Website creation DKIM failure on custom installs
Related: Ticket #RMKRFFGKC
