the last update of thunderbird (the version is now 52.1.1 (64-bit)) on ubuntu 16.04 causes my mail client to get stuck with the message
Status: Creating mail message...
then nothing happens anymore. i can cancel but not send the mail again... this happens often. i then have to start a new message and try again until the message is sent.
is there a fix for that? is that a bug? i have not changed anything in the configuration of the mail accounts since the update.
update: as Debora Weber-Wulff pointed out this may be an enigmail related issue only. (confirmed!)
update: there is a bug report for enigmail.