I have several blogs, and some of them have an associated newsletter that is sent to the interested users on each of the sites.
But managing those subscribers and newsletters is painful. We have to go one by one, and I'd like to have a "central headquarter" to manage all our subscribers and the newsletters they want to be sent to them on each case.
I'd like to do this from a WP site, and I know about some registration and newsletter plugins, but none of them seem to manage several newsletters (one for teachers, one for students, for example) and allow a user to enter its profile (with a user/passwd) and check in or check out on the available newsletters.
Is there some way to solve this?