Interspire Email Marketer - Security (my emails lists)

Hi!

I recently hired someone to configure a server for me and to setup Interspire Email Marketer. I never used Interspire before and want to be sure that my email lists are fully protected. Is it enough to change the password of my Interspire account to ensure that "the guy" can't access the software and steal my email addresses?

And if not, what can I do to secure my lists?

Andy

I have a question, If I want to add members to use the autoresponder, can I add them? What is the user purchase for, Admin? Is there a way to add members to use the autoresponder and set up campaigns? Please let me know, thanks. -- Do they have an unlimited version. I see it goes up to 20 users.