I don’t think you were asking about “templates” were you? If I’m missing something there please specify as I’m not sure if maybe James is privy to something I’m un-aware of.
As to your question as I read it, you’re looking to process your imported email addresses through a campaign. So technically, you don’t get email’s to go through a campaign but rather the contacts that are using the emails. Sounds like a small distinction but a very important one since Infusionsoft is contact-centric. So if you raise/apply a tag on the contacts with email addresses that you wish to send through, and the campaign that you wish to run has a goal for that tag application, then each will run through the campaign and send emails et al to their respective email address.