It's a constant issue for people who run software like offlineimap across multiple machines: https://www.offlineimap.org/doc/FAQ.html#what-is-the-uid-validity-p

It's a constant issue for people who run software like offlineimap across multiple machines: https://www.offlineimap.org/doc/FAQ.html#what-is-the-uid-validity-problem-for-folder https://www.offlineimap.org/doc/FAQ.html#what-is-the-uid-val...