The WAN IP "XXX.XXX.XXX.XXX" of this FortiGate has been blacklisted by one or more vendors

[smalle]

Morning, in my fortigate 800C, i see this error since 2 week. Help me please to resolve it.

[emnoc]

Go to a RBL listing and confirm but basically you have a host or hosts sending spam from your  network or a open-mail-relay. I would allow mail from  only designated mail-servers and/or device. Read my HOWTO avoid being on a RBL

http://socpuppet.blogspot...ng-blocked-on-rbl.html

HINT:  I would started by doing  a google search for mxtoolbox and use the  open-relay checker against any exposed mail-servers.

Ken

[ede_pfau]

A quick remedy would be - IF you've got a second public IP - to create a secondary IP on your WAN interface to get your network connected. Of course, if there is a malware source on your LAN you'll burn this IP quickly.

[emnoc]

Or if he has a range of  subnet/address routed to him he could use a ippool and SNAT mail from a "non" BlackListed address ;)

 Either  way, he needs to fix the root cause to avoid being on a RBL to begin with ;)

Ken