Microsoft will start with a hosted e-mail filter and anti-malware service.

FORBES: Microsoft Heats Up Security

Most BlackBerry phones have a flashing light that blinks when an e-mail comes in, and a built-in option to filter alerts so that you only receive them from contacts you prioritise.

BBC: Managing e-mail while on the road

Spam might show up in my inbox a few times each week, while I need to remember to check several layers of junk mail filters for false positives legitimate email marked as spam by an aggressive filter.

FORBES: Ignore Your Mail And Lose Thousands of Dollars