Answer: gmail
AnswerCrossword Clue
GMAILService with nearly two billion users
GMAILAlternative to AOL or Yahoo
GMAILCommunication service since 2004
GMAILService with more than a billion users
GMAILYahoo alternative
GMAILService launched on April Fool's Day in 2004
GMAILOnline service introduced in 2004
GMAILService with more than 1.5 billion users
GMAILApp with an envelope icon
GMAILWeb-based correspondence service
GMAILOutlook alternative
GMAILTech service with over half a billion users
GMAILPriority Inbox offerer
GMAILFree Web-based correspondence service
GMAILBig name in Web-based correspondence
GMAILWeb-based service with millions of users
GMAILGoogle Apps component
GMAILAOL alternative