Autoresponders: How to exclude responders from follow-up emails?

Autoresponders: How to exclude responders from follow-up emails?

Hi there,

I recently sent out an email campaign, and scheduled follow-up emails via Email-Action Autoresponder, to people who open/click, as well as to people who do not open the initial email.

Now, how do I exclude people who opened/clicked on the initial email from receiving a follow-up email, if they contacted me in the meantime?

I obviously only want the follow-up emails to go out to people who did not get in touch with me in the meantime. How can this be done?

Thanks for any help,
Steffen