Desktop App For Managing Multiple Gmail Accounts Mac

How do I know which option is best for me?. ' It got me thinking: Should I be using a desktop email client? A lot of people I know just use webmail (specifically, Gmail), and seem very happy, but the desktop options are intriguing.

Dear Lifehacker,Desktop email clients like Sparrow and Postbox seem like they're breathing new life into desktop email, but I'd also heard that Thunderbird is going into 'maintenance mode.