I have a Windows 10 Laptop with Office 2019. The email account is a straightforward POP3 account.

My problem is that indexing fails repeatedly. I've rebuilt the search index so many times and it works for a day or two, but then indexing of new emails just stops. There are no errors (that I can find) just that if I search for an email it doesn't find any past a certain date. Even if I can see that email unread in the inbox, searching for the sender won't find it.



There's about 130K search items and rebuilding takes a couple of hours.

What can I do to fix this once and for all?