1,657 votesSt. Mueller commented
Like others I have been using Yahoo's disposable addresses frequently. This useful mechanism made good sense because it has kept my main email address save so far. The down side is that I cannot possible imagine how to test all 141 addresses manually through HIBP and I do not know enough about working with the API to do it on my own.
Ever since I first heard about HIBP, I was hoping for such a possibility and I am hopeful that this discussion leads to some useful outcome. My first idea was to feed a list of email addresses into HIBP and that the results are sent back to these email addresses. I am sure there are things that I am overlooking but it seems reasonable that mainly the owner of the address in question should be the one informed.
Many, many thanks to the people behind this valuable tool!