Hi jdcard,
For Method, you would use Cases to keep track of your support cases. With the addition of either the Gmail Gadget or the Outlook Plugin, it will allow you to log incoming emails and respond to those emails through the plugin/gadget by updating the case notes in Method. It can either update or create a new case.
Regardless of whether you wish to have your Method users use the gadget or plugin, the case notications are sent using the Method user's email address. This will allow your customers to reply directly to the support person if they wish. The support person can then log the email response in Method or use the gadget or plugin. In that case notification, there is also a link to the Method portal where customers can respond directly in the case notes if they wish.
This is the stock functionality (with the exception of the gadget or plugin) so no additional configuration is needed. To get a better understanding of this, you can view our Webinars. Look for the Cases and Solutions webinar.
Hope this helps.
- Adam