Can not send mail to every emailadres after upgrade to thunderbird 45
after upgrade to thunderbird 45 i can not send or reply to some emailadress and get this message
Action: failed Status: 5.6.1 Diagnostic-Code: smtp;554 5.6.1 Body type not supported by Remote Host
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See if the information from this thread helps. https://support.mozilla.org/en-US/questions/1119474