Kmail cannot send email after turning on the VPN (openvpn) -> "Failed to transport message. Connection to server lost".
(Company smtp -> STARTTLS / 587)
Thunderbird works just fine. Trojita (which uses akonadi backend as well) seems to be affected in the same way.
Mail not send -> notification "Failed to transport message. Connection to server lost"
Mail to be sent.
Linux: KDE Neon
KDE Plasma Version: 5.22.4
KDE Frameworks Version: 5.85.0
Qt Version: 5.15.3