Send and receive email.
For help using Geary, try the following:
Consult the online manual, in Geary: Press F1 or from the app menu: Geary > Help
Keyboard shortcuts can be accessed via Ctrl + ? or from the app menu: Geary > Keyboard Shortcuts
Using GMail? You may need to update your Google Account settings to be able to connect.
Consult the Frequently asked questions
Notes on Geary's full-text search strategy
If all else fails, get in contact via the mailing list or on IRC