Apple Releases Mail Update for OS X 10.9 Mavericks
Apple says Mail Update for Mavericks includes improvements to general stability and compatibility with Gmail, including the following:
Fixes an issue that prevents deleting, moving, and archiving messages for users with custom Gmail settings
Addresses an issue that may cause unread counts to be inaccurate
Includes additional fixes that improve the compatibility and stability of Mail
Choose Apple menu > Software Update to check for the latest Apple software via the Mac App Store, including this update.
You can also download the manual update installer. This is a useful option when you need to update multiple computer, but only want to download the update once. Standalone installers are available from Apple Support Downloads:
http://support.apple.com/downloads/
For more information, visit:
http://support.apple.com/kb/HT6030