You're right, it's a trivial wrapper with a subjective/opinionated usability improvement. I think the biggest service here is 1. Education about Python's pret

You're right, it's a trivial wrapper with a subjective/opinionated usability improvement. I think the biggest service here is 1. Education about Python's pretty decent standard smtpd lib. 2. Food for thought about making thin custom interfaces over standard libraries. 3. Perhaps inspiration to do more? It's no Linux kernel, but I enjoyed reading through the source and I feel like I have a better understanding of Python's smtpd lib and I've some of my own ideas for future API design. Additionally, I like your generator-based API proposal. Also inspiring. Need to think more about routing in that context, though.