|Initial release||December 31, 2007|
|Operating system||Mac OS X|
Mailplane is an e-mail client for Mac OS X that "wraps" the Gmail service as a site-specific browser. This gives the user a more application-like experience than using Gmail in a browser, including the ability to drag and drop files into attachments, use the OS X Address Book and Keychain, use spell checking, easily send images, and use Gmail as the outbound mailer when clicking on mailto links. It is written using Mac OS X's Cocoa and WebKit APIs.
CNet awards it a five-of-five star rating, while Macworld gives it a 3.5 out of 5.The Verge does not provide a rating as such, but rates it highly in their review, while a roundup of similar software by AppleInsider stated "MailPlane offers the best OS X experience of any third party mail application."
As of July 8, 2020, an older version (v3) of Mailplane will no longer have access to Gmail data, rendering it inoperable. Later versions (Version 4+) are approved by Google and will continue to operate.