Verify Sender’s IP Reputation

Question

I currently have a situation where on of my SP`s has been blacklisted, due to weak password by a user and therefore spam mail being generated. 
 
 I need to whitelist this ip but I tried it both under 1. Protect -> Email -> General settings -> Spam Check Exceptions 
 as well as 2. Protect -> Email -> Policies where I created a whitelist with their ip as per https://community.sophos.com/kb/en-us/123258 
 this post however was in 2015 and could not find any post later than that. 
 Im running SFOS 16.05.4 MR-4 
 
 Any assistance will be appreciated

lferrara · Answer

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.

lferrara · Answer

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