Primary Goal:
Marketers who send emails on behalf of Sales Reps need a way to track how many replies Sales Reps are getting from the program in order to measure ROI and automate other activities based on email replies.
Secondary Goal:
Marketers would also prefer to parse the text of the replied email to scrub for unsubscribes in order to manually review or automatically unsubscribe certain types of responses.
Optimal Solution:
A self-contained solution in Marketo that operates similar to the SFDC Email-to-Salesforce activity attachment process in order to both log activities, and log email replies.
Potential Work-around:
I'm thinking of a solution in Marketo Sales Insight for SFDC that can use SFDC email alias (which is out-of-the-box functionality) plus a bit of SFDC apex code in order to create an activity on the SFDC record.
Best,
Isaac