Rated 4 out of 5 stars

Reinstalled after initial hassles, and now seems to work better than before, as revisions and upgrades are issued. Have no problem with Gmail interface, and a few other (low-volume) addresses I maintain. Was totally unable to make it work with any POP3 addresses/configurations, but that's not a deal-breaker.
A good and useful add-on.

This review is for a previous version of the add-on (2.3.4).  This user has other reviews of this add-on.