Mac users interested in App for airmail for os x 10.6.8 generally download:
Airmail 2.5 is a new mail client designed for OS X 10.10 Yosemite with fast performance and intuitive interaction. Support for iCloud, MS Exchange, Gmail, Google Apps, IMAP, POP3, Yahoo!, AOL, Outlook.com, Live.com.
Airmail was designed from the ground to retain the same experience with a single or multiple accounts and provide a quick, modern and easy-to-use user experience.