Hello,
We are unable to send emails to clients using Symantec. 2 of our IP addresses have a negative reputation at https://ipremoval.sms.symantec.com:
104.238.182.58
133.18.201.149
-spf/dkim/dmarc and rDNS are properly configured
-we never engage in email marketing (total of less than 500 emails per month from both IPs)
-we strictly manage server security and have never had a problem with malware.
I believe these IPs are on the blacklist due to the actions of previous owners.
I would be much obliged if you could investigate and remove these IPs from the blacklist.
Thanks !
Rory