During March 2025, Zyt enhanced SMTP error handling in the microsoft/git repository’s git-send-email tool, focusing on backend development and email integration using Perl. Zyt introduced an eval-based error capture mechanism to catch exceptions during SMTP authentication and sending, then implemented a dedicated handle_smtp_error function to parse and classify SMTP status codes. This approach distinguished between transient (4yz) and permanent (5yz) errors, enabling smarter retry logic and more accurate reporting. The work improved reliability and diagnostics for automated mail delivery workflows, demonstrating a strong grasp of email protocols, robust error handling, and maintainable code practices within a production codebase.