You are downloading the Yahoo mail XAP file v18.104.22.168 for Windows Phone. Yahoo mail is a free and useful News & Weather app: Yahoo Mail for Windows Phone. Stay connected - Access your inbox in just one tap - Stay on top of your new messages with ... You can now download the offline XAP file to install & try it.
Download Locations for Yahoo mail 22.214.171.124 XAP file
Important Notice: Now Due To Unspecified Limitations, You Can Not Use The Offline XAP File To Install It Any More.
To try to install it manually from an SD card, you should choose one of the server location above to get the offline Yahoo mail XAP file, move the file to your phone's SD card and then tap 'Install local apps' in the phone's App list.