(name . Leo Famulari)(address . email@example.com)
So, mxparser seems to be pretty easy to package, but it depends on xmlpull v1. Unfortunately, it was developped at Extreme! Lab at Indiana University, but their website has recently been "deprecated" and redirects to the internet archive.
This is an issue as we have xmlpull v2 and xpp3 whose sources have also disappeared. Not sure what to do about them?