On Wed, 10 Feb 2016 14:01:11 +0200 Alaa Salem <aasalem10 at gmail.com> wrote: > https://askubuntu.com/questions/727254/claws-mail-3-11-1-could-not-queue-message-for-sending The claws-mail log you provided there is not the sending log. Please provide the network log during a send attempt. with regards Paul