Ques #1 Does the e-Newsletter plug-in have a means

Ques #1
Does the e-Newsletter plug-in have a means to manage the database of people that subscribe and unsubscribe?

Ques #2
If e-Newsletter does not do this than what plug-in do you have that would manage such a database of people as they subscribe/unsubscribe, change email addresses etc.

Thank you.
Doug