Hello, Since the end of November at least, a number of our users are reporting that when some people try to reply to their email, they are getting rejection messages stating: "This is the Spam & Virus Firewall at barracuda.(domain). I'm sorry to inform you that the message below could not be delivered. When delivery was attempted, the following error was returned. <senders email address>: host 172.21.0.57[172.21.0.57] said: 554 5.6.0 Invalid content (in reply to end of DATA command)" The emails are being allowed through the Barracuda firewall device. The message is then rejected on our EDGE Exchange email server that uses ESET Mail Security for Exchange 4.3. The messages are seen in the Antispam log of ESET with a score of 90. We have determined that the reason is because of the Stationery Themes in our user's original email message that was used in a reply. Most likely culprit is the LEAVES stationery theme. ESET is seeing the add-on graphics as indicators of spam. Please note, these are users who have been upgraded from Office 2003\2007 to now using Office 2010. So, this stationery is a carry over form the previous version. I have fresh install of Office 2010 and I am unable to find the LEAVES stationery theme.