I just started using Entourage and would like to embed a file in an email. When I tried to do this, I got the following message: Error - 5.7.0 Must issue a STARTTLS command first. f21sm7299222rvb.0

I think it is because I am supposed to put some html code in the email too, but have no idea what the code is. Can anyone tell what to do here? I would really appreciate it!