Motorola has agreed to sell its answer to Research In Motion's BlackBerry service - Good Technology - for an undisclosed sum, bringing an end to the company's foray into push services.
Good Technology will be acquired by Visto, a California-based company that provides push email technology to mobile operators.
Motorola acquired Good Technology in 2007, part of a plan to compete with rival RIM's popular BlackBerry service and make inroads with business users.
But Motorola's handset shipments slipped and the company fell on hard times, posting a $3.6bn loss for the last quarter of 2008.
Faced with waning popularity of the Razr mobile phone line, Motorola's mobile handset unit has struggled, with fourth-quarter sales dropping to $1.5bn - a fall of 51 percent compared to the same period one year earlier.