Here is a description of some of the causes of SBCGlobal email not working. They are as follows, beginning with the problem of sluggish Internet speed or a down Sbcglobal server. You may have been running an older version of the browser, or you may have configured the browser incorrectly. You may have used wrong login credentials or configured your email in an ineffective manner. The date and time settings must be wrong, or there must be malfunctioning add-ons installed.