- Added comprehensive .gitignore file with .DS_Store and common ignores
- Updated backend/.env SMTP_PORT from 587 to 2525 for Gmail smuggler
- Updated Memory Bank documentation with Gmail smuggler implementation
- Removed smtp-relay-container directory (moved outside project)
- Added support for multiple PDF MIME types (application/x-pdf, etc.)
- Added fallback to file extension validation (.pdf)
- Added detailed logging for debugging upload issues
- Resolves 'Only PDF files are allowed' error for valid PDFs