If you do not want to set up the Salesforce Plugin, which we recommend, you have the option to BCC all outgoing emails to Salesforce automatically.
Find your Salesforce BCC Email
1. Find your user name at the upper right corner and select the drop down bar.
2. Select "My Settings" or "Setup" from the drop down bar.
3. Select the Email tab under “My Settings" and click on “My Email to Salesforce" tab
5) You will see your email to salesforce address highlighted
Note: Make sure the beginning of your BCC address reads: emailstosalesforce.