Every time I try to forward an email in Thunderbird I get this message. I can get emails in Thunderbird, Firefox (from Comcast) and Microsoft outlook. Firefox lets me into the my emails by my signing in thru their discovery website and I can forward them. I'm not sure about Outlook. You don't have permission to access "http//login.xfinity.com/login" on this server. Reference#18.Ge03417.172891939.35ff2c9 https://errors.edgesuite.net/18.6e0f3417.1727891939.35ff2c9