When i share a file via mail with my iPad, it does not reach the recipient. My mail work perfectly when i use it directly but some how it does not work with adobe reader.
What is the mail app that you use on your iPad?
Acrobat Reader uses Apple Mail by default. It assumes that an Apple Mail account is already configured correctly.
If your mail app is something else (e.g. Gmail, Outlook), you need to select your mail app when you share a file via email.
If your mail app on your iPad is Apple Mail and it still doesn't work, you may want to try opening a file and sharing it from iBooks for troubleshooting.
Please let us know what you find.