Hi Guys,

I am getting the below bounce back when I send emails with to 2 of my clients with cyberoam firewalls.

Diagnostic-Code: SMTP; 550 Cyberoam Anti Spam has blocked this email because the sender's IP Address is blacklisted.

I have checked my IP and it is not listed on any blacklist database.

How can do I go about this.

Regards,
C . K