This appears to be a known upstream bug (https://bugzilla.mozilla.org/show_bug.cgi?id=1371309), which was fixed in thunderbird 78 indeed. Let's keep this bug open until 78 is backported to bionic.
** Bug watch added: Mozilla Bugzilla #1371309 https://bugzilla.mozilla.org/show_bug.cgi?id=1371309 ** Also affects: thunderbird via https://bugzilla.mozilla.org/show_bug.cgi?id=1371309 Importance: Unknown Status: Unknown -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to thunderbird in Ubuntu. https://bugs.launchpad.net/bugs/1899485 Title: cannot send message Status in Mozilla Thunderbird: Unknown Status in thunderbird package in Ubuntu: New Bug description: using 1:68.10.0+build1-0ubuntu0.18.04.1 When I try to send a message, nothing happens. In the console, I see this error message JavaScript error: chrome://messenger/content/messengercompose/MsgComposeCommands.js, line 6156: NS_ERROR_NOT_IMPLEMENTED: Component returned failure code: 0x80004001 (NS_ERROR_NOT_IMPLEMENTED) [nsIMsgCompose.expandMailingLists] This currently makes thunderbird unuseable. Best regards Alexandre To manage notifications about this bug go to: https://bugs.launchpad.net/thunderbird/+bug/1899485/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
