To answer your question yes a mail server will answer to your IP address. So [email protected] will work (with a routable IP address of course). The problem is whether or not you have a static or dynamic IP address through your ISP. If it is static this is no problem, however, if it is dynamic you need a way to put up your IP address so others will know it. It is better to just use a dynamic dns for this, some were listed above but another that I use is www.dns2go.com (didn't see it listed above).

Anyway, the short answer is Yes. The long answer requires more information from you but the above should give you an idea.