SUMMARY 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. OBSERVED RESULT Mail not send -> notification "Failed to transport message. Connection to server lost" EXPECTED RESULT Mail to be sent. SOFTWARE/OS VERSIONS Linux: KDE Neon KDE Plasma Version: 5.22.4 KDE Frameworks Version: 5.85.0 Qt Version: 5.15.3 ADDITIONAL INFORMATION