There isn't much you can do. You should have SPF records to identify allowed sending IP addresses and can set up DKIM authentication as well, both of which allow people who receive your email to get some indication if email is authentic or spoofed. When you get bounces, you can track back to the sending IP and complain to their abuse email, if they have one. That seldom get anywhere but sometimes being told a server is spamming will get the company whose server has been hacked to find the hacked account. By a lot, how often do you see this? Charlie Heath Town Websites -----Original Message----- From: hidden-discuss-bounces at lists.hidden-tech.net [mailto:hidden-discuss-bounces at lists.hidden-tech.net] On Behalf Of Jonathon Podolsky Sent: Thursday, February 13, 2014 4:30 PM To: HT-discuss Subject: [Hidden-tech] email spoofing ** Be sure to fill out the survey/skills inventory in the member's area. ** If you did, we all thank you.