Hello, since last week we are getting error meesage: "Sending of the message failed. Unable to open the temporary file (path to temporary file). Check your 'Temporary Directory' setting." at several workstations. After deleting temporary files in that directory, we were able to send one message, but then the problem occured again.

Colleague disabled the HTML and then it started to work. But is there any "workaround" or solution, that will solve this problem without disabling HTML?