https://login.comcast.net/login?reqId=d6b6d1dc-07fa-43e9-bcaa-2f81114633f7&forceAuthn=false&ts=5517b202&ipAddrAuthn=false&lang=en&s=wnamp&deviceAuthn=false&r=comcast.net&continue=https%3A%2Fxfinityconnect.mail.comcast.net%2F&passive=false&rm=2

This URL has not been tested yet.