I have a list with several categories, how can i offer a user a chance to subscribe to several lists at once?
Multi-list subscription forms are described on
this help page.
With v1.8x's user selection feature you might have all users in a single list but use a value in a custom field to categorize your subscribers.
How can a user unsubscribe just from several and not all lists?
v1.8x contains an updated remove link feature. You can set your code to unsubscribe users from one, some, or all lists. There is also a one-click remove option now.
And a way to send email to user for them to update their info themselfs.
Unfortunately this is not yet a feature but can be accomplished with a custom script identifying users based on the "User's Unique ID" message code.
I am working on how to best implement this feature.
Thanks for your suggestions!