Verify Sender’s IP Reputation

Willem,

if your ISP has been blacklisted, you will not receive any email because as soon the remote mail servers try to send you an email, the ISP MX record will appear in blacklists so the connection will be rejected. Talk with your ISP and fix the issue with them.

thanks for the response

I might not have put it clear (sorry)

the issue isn`t with my ISP but with one of the external system providers of one of our systems.

when they send the mail the firewall reject the mail saying that their ip is blacklisted.

the question therefore is if there is way for me to ad them to a whitelist or exception group to allow their ip irrespective of the fact they the have been blacklisted.

Willem,

sorry about that. I did not understand correctly. Anyway you can use SMTP Scan Policy under Email and in the filter criteria use the source IP/network as SMTP.

This should be enough!

Regards

Luk

I did that already but still not working.