I wouldn't start with this (MailChimp calls that "groups") until you are mostly clear with what you want to discuss...
I don't have any best practice, but I felt than more than 3 would be completely overkill in my case.
Not having groups allows you to move around a bit more easily - angry people will just unsubscribe :-) But I also felt that having groups would help some people remain subscribed in my case.
I don't have any best practice, but I felt than more than 3 would be completely overkill in my case.
Not having groups allows you to move around a bit more easily - angry people will just unsubscribe :-) But I also felt that having groups would help some people remain subscribed in my case.