ESA Product Support | ESA Guided Setup | SMA Product Support | Encryption Product Support Email Submission and Tracking Portal | Cisco Talos Reputation Center Support | CRES | Talos
Cisco: Open a Support Case | Support & Downloads | Worldwide Contacts | Bug Search | Notification Service |
ESA: | 13.5.1-277 |
SMA: | 13.6.2-023 | |
Email Plug-in (Reporting): | 1.1.0.133 | |
Email Plug-in (Encryption): | 1.2.1.151 |
Hello,
I am wondering if DLP be used to prevent email from a specific domain from being forwarded?
Shawn
If you mean inbound mail, no. Its only applied to Outgoing messages.
If you mean messages received from domain x, and then forwarded by your users, maybe... Depends on your DLP app.
You may be able to do it with a content filter as well...
As the other answer says DLP only applies to outbound mail, and typically is used to look at email content not just the metadata (from, to, etc). You could try tagging the incoming email from the specific domain with an x-header (e.g. X-DoNotForward) and then in your outbound filter look for that header and reject any emails or bounce them back to the sender with a notification message. You do not need DLP to do this.
Adding a "do not forward" header is actually a pretty elegant solution. The email system you use may be able to act on that header as well (I know Exchange 2010 can)