Please don't email me if you use worldnet.att.net, roadrunner, or comcast. Their incompetent anti-spam blacklists block the whole subnet including our mail server's IP address. So if I reply to you, the reply will bounce. Tip: switch to Gmail; your life will get better in a lot more ways than smarter spam filtering.
I've had three complaints this week from people who were unable to email to my AT&T address. If you send it to marshall at prestoviace dot biz, it will get to me.
I have reported this problem to AT&T and have received their mail bot in response. Obviously I will have to look into another ISP provider. Sigh.