If is is, please, a link to the correct apt tde.list file please.
kde & kmail-5.15 is buggier than a 10 day old road kill in August. And there is little help available on the kdepim mailing list. No one seems to know how its really supposed to work. So far its imported all my mails from the stretch version, then thrown them away, and I can't keep a list of filter rules intact more than 48 hours.
Cheers, Gene Heskett.