Google Mail Server Standard Edition

If you happen to have a domain name, but not intended to get a webhosting. Anyhow you need a mail server, you may consider the google mail server.

http://www.google.com/a/cpanel/domain/new


for hosting your MX record, you may consider ZoneEdit.com.
to add MX Record, follow the below link:

http://www.google.com/support/a/bin/answer.py?hl=en&answer=55378