You're looking at StableBuild's Deleted PyPI mirror - where we index all deleted packages from the Python package registry.

mbox
0.1.9

This version was deleted from PyPI around 2025-07-10. Installing fails with:
$ pip3 install mbox==0.1.9 ERROR: Could not find a version that satisfies the requirement mbox==0.1.9
View other deleted versions of mbox

Install through StableBuild

You can install this package from StableBuild's PyPI snapshots from before the version was deleted:
pip3 install \ -i https://YOUR_API_KEY.pypimirror.stablebuild.com/2025-07-09/ \ mbox==0.1.9
Sign up for StableBuild to get an API key (it's free and takes <60 seconds!)

Or, download files manually

And install manually via pip:
mbox-0.1.9-py3-none-any.whl (43.7KB)
mbox-0.1.9.tar.gz (40.8KB)