EMail Accounts are SPAM free. Here's the thing, if someone is sending an email to this domain, and the user does not exist, then that email will not get on the system. If the user does exist, but the sender is from a known IP that has SPAMMED or listed from one of the following blacklisted country known to not care about SPAM.
Blacklisted countries are as listed:
This list is not all inclusive, and is subject to change at any given time without notice.