How do I clean my Email Campaign mailing list of inactive subscribers?

I would like to remove the inactive subscribers from my Email Campaign mailing list, preferably based upon the length of time since they last opened an email.

Is this possible?

I can't find a way to view subscriber open rate analytics.

Any suggestions are greatly appreciated!

I doubt that this type of filtering is available, although I do know that it is available in mailchimp. I've not look at open rate analytics via the SS system so maybe someone who has can write a reply here.

I am also trying to figure out how to do this without moving my email newsletter to Mail Chimp. Any update on this feature?