Evernote has recently added the ability to chat with others inside the app where-ever you are using it. The guide below demonstrates this on the Mac but the principles are the same whatever software you are using. I'd recommend using this feature in order to cut down on unnecessary email.
Inside Evernote you will have seen the Work Chat icon so this is a good place to start.
It is also possible to share individual notes with others as shown below.
Finally it is also possible to 'chat' about an entire notebook using Work Chat. This gives permission and a link to the notebook at the same time in the chat window.
For more information on how to use Evernote Work Chat visit the knowledge base here and keep checking back on this blog for more 'How To' guides.