- Build script now shows summary of embedded credentials after build
- quick-test.sh now checks if binary has credentials before running
- This prevents the "dial tcp :143" empty server error
Tests if help output shows empty string in default values.
- TEST-PLAN.md: 38 detailed tests covering all features
- quick-test.sh: Automated quick test for basic functionality
- Tests include IMAP, SMTP, attachments, SSL/TLS, error handling
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