Could you suggest us an single stand alone email server droplet setup?

We found several solution such as Iredmail or Postfix. The first seems easy to use but with no anti-spam options other than the buit-in, i.e. no service or plug-in found to buy as an out-of-the-box solution such as magic-spam. The second has anti-spam solutions but it requires much more IT skills and effort which is not available for the time being.

We would like one server with 20 to 50 low bandwidth accounts email with an Anti-Spam add on plug-in service.

Any Suggestions?

Or even better any ready droplet to start it immediately?

Best Regards,

Dimitrios