Please read this article first. Then see the steps below.
Step 1: add your Evernote address* in Braintoss. Go to settings and then click on “add e-mail address”. Paste your Evernote address here.
Step 2: if this Evernote address is your default address in Braintoss, it will automatically send to this Evernote address. If you have multiple email addresses in Braintoss you can select the email address by holding the “+” button before sending.
*To find your Evernote email address (you must have a Premium or Business account), open Evernote and go to the Account Summary. You can see your Evernote email address there under Email Notes to. For more information: https://help.evernote.com/hc/en-us/articles/209005347-Save-emails-into-Evernote