[marcosdumay]

So... SMTP client misses basic SMTP functionality that fits in the 20 lines summary.

Good luck having it handle any of the SMTP craziness that isn't on the short introduction to the protocol.

[banish-m4]

When you roll your own library duplicating something that likely already exists, you own it all. And that doesn't include all of the vendor-specific nonconforming edge-cases.

[marcosdumay]

I guess when you roll your own library, you get an obligation to read the introduction of the 10 pages long standard.

Or the usage example.