I need a small, self-contained Windows desktop application that can blast out large batches of emails through my own SMTP server. All I want to do is drop in my server credentials (host, port, username, password, SSL/TLS toggle), load a recipient list, write or paste an HTML/plain-text message, and let the program handle the rest. Key points • Runs natively on current Windows versions—no browser dependency once installed. • Works exclusively with a configurable custom SMTP account, Gmail or Outlook presets. • Shows real-time progress: how many sent, failed, queued, and any server responses. • Accepts standard TXT address lists and ignores duplicates automatically. • Generates a concise delivery log I can export for future reference. I’m happy with C#, Python (PyInstaller), Electron, or any framework you’re comfortable compiling to a single installer or portable .exe. Clean, well-commented source code and a brief read-me explaining build steps are part of the deliverable. If you’ve built something similar, feel free to mention it so I can gauge fit. Looking forward to a straightforward, no-frills sending tool that just works.