Zimbra blocking valid email
I have a Zimbra user trying to send a Power Point attachment (*.ppt extension) to internal users. Zimbra is blocking it with the message below. It is not a virus. Any suggestion on how to stop this from being blocked?
Also, I sent the attachment from my Zimbra account to hotmail and yahoo and it never not showed up in either account; nor did it bounce.
----- Forwarded Message -----
From: "Content-filter at webmail.brs.com" <email@example.com>
Sent: Wednesday, March 24, 2010 11:31:16 AM
Subject: VIRUS (Encrypted.Zip) in mail TO YOU from <firstname.lastname@example.org>
Our content checker found
in an email to you from probably faked sender:
claiming to be: <email@example.com>
Content type: Virus
Our internal reference code for your message is 15045-14/KNl7x0CtNNff
First upstream SMTP client IP address: [10.9.10.xxx] unknown
According to a 'Received:' trace, the message apparently originated at:
[10.9.10.xxx], webmail.brs.com unknown [10.9.10.xxx]
From: Ed Small <firstname.lastname@example.org>
X-Mailer: Zimbra 6.0.4_GA_2038.RHEL5_64 (ZimbraWebClient - SAF3
Subject: Fwd: Board Discussion
The message has been quarantined as: virus-KNl7x0CtNNff
Please contact your system administrator for details.