springfeld

E-Mail isn't email.

Provide as MX to your own is impossible if you only have dynamic ip: Most ranges are on spam lists, for good reasons.

Hosting everything else is possible.

I work for a company that makes use of three components: a so called smarthost, that does AV and Spam detection, a newsletter host and groupware server.

Many more combinations are possible.

But you would have to wait for day 1+ to realize