Al actualizarse Thunderbird de versión 68 a versión 78 no entran ni salen los mails (servidor de correo pop). Agradecería que me indiquen como solucionar dicho problema ya que con la versión 68, antes de la actualización todo funcionaba perfectamente. O como volver a la versión anterior o sea la 68.

When the 68 Thunderbird version was updated to the 78 version, neither the incoming mails nor the ones I wanted to send worked. I would appreaciate your telling me how to solve the problem as with the 68 version before automatically updating the 78 version, my e-mail account worked properly. So I guess you might as well tell me how to undo this updating and go back to the 68 version that works on my computer. Since this is causing great trouble as I can´t carry on with my daily work routine, I would really appreciate an answer as soon as possible. Regards, Oscar J. Campastro