[Alex3917]

What's the main difference between the library you're building and mail parser?:

https://pypi.org/project/mail-parser/

Since there isn't any documentation, I'm just trying to figure out what's it's actually doing (without reading the source).

[Sir_Cmpwn]

The library emersion is working on does not parse an email, it parses a thread of emails. It can relate several emails together into a tree of responses to the original email and break down the responses to e.g. particular lines of code in a patch.