I just finished adding an SPF record on my personal domain. So, if your mail provider uses SPF, you won't get any email from spammers trying to impersonate me. If you do get spam that says it's from me, your mail provider isn't using SPF. Tell them to go to www.openspf.org and implement SPF checking on their inbound mail servers. SPF isn't 100% foolproof but it can really help cut down on the spam.