[Plugin: Mailz]

Just activated and installed Zingiri Mailz (also called “Mailing List”) plugin, v. 2.0.7. I see that it uses remote servers, so I’m concerned that users’ email addresses are being kept somewhere other than my own DB, A) for security reasons; I don’t want my mailing list falling into the wrong hands (i.e., anyone other than myself), and B) what happens if/when Zingiri goes out of business? Don’t I lose my mailing lists (unless I’ve stored them somewhere else, as well)?

If my concerns are warranted, is there a better mailing list plugin (preferably free of charge) which is easy to use and will not store my mailing lists on a remote DB?