The recent update in testing/buster of qtbase-opensource from 5.11.1+dfsg-6 to 5.11.1+dfsg-7 seems to break KMail 4:17.12.3-1. The only way I could get KMail working again this morning with external imap servers was to downgrade to the following: libqt5concurrent5_5.11.1+dfsg-6_amd64.deb libqt5core5a_5.11.1+dfsg-6_amd64.deb libqt5dbus5_5.11.1+dfsg-6_amd64.deb libqt5gui5_5.11.1+dfsg-6_amd64.deb libqt5network5_5.11.1+dfsg-6_amd64.deb libqt5opengl5_5.11.1+dfsg-6_amd64.deb libqt5printsupport5_5.11.1+dfsg-6_amd64.deb libqt5sql5_5.11.1+dfsg-6_amd64.deb libqt5sql5-mysql_5.11.1+dfsg-6_amd64.deb libqt5sql5-sqlite_5.11.1+dfsg-6_amd64.deb libqt5test5_5.11.1+dfsg-6_amd64.deb libqt5widgets5_5.11.1+dfsg-6_amd64.deb libqt5xml5_5.11.1+dfsg-6_amd64.deb
Andy.
