Last year, Google lost the right to use the name of their mail service “GMail” in UK and Germany. CNET —”Google's free Web e-mail offering may be available for correspondence in 40 languages, but efforts at worldwide expansion using the moniker "Gmail" continue to face complications.
Last October, the search giant grabbed headlines--and miffed some British users--when it voluntarily renamed its service "Google Mail" in the United Kingdom, following an out-of-court trademark dispute.”
In the UK, Gmail or gmail.co.uk is the private mail service reserved exclusively for the customers of the Contensis Content Management System —that enables both technical and non-technical staff to edit, manage and publish web, intranet or extranet content with ease and flexibility.[...]
Gmail was also the name of a "sql based vfolder email system", now defunct.