New install sees only new messages
I have a working system. Using Thunderbird on Linux Mint MATE. I install on a new system and copy over the .thunderbird directory. Some accounts are working just fine, but two accounts have only new emails showing up. On the webmail interface, of course, these two accounts have only the new emails. But I do not understand the system well enough to work out why the old setup shows the old emails and does not match the webmail.
Opaite Mbohovái (2)
EDIT Only the inbox folder has the problem in each case. Other folders are full of the old stuff.
EDIT 2 It is all IMAP. I went over from POP several years ago.