Hello, I am the administrator of the mail server that keeps having issues sending emails to some domains due to having a low reputation by Simatec, as it was confirmed to me by the receiving side's administrators.
I tried delisting IP multiple times here: https://ipremoval.sms.symantec.com/ipr/lookup , however that url does nothing.
The IP is: 116.202.19.211
The server is running iRedMail, Has properly set reverse DNS, SPF, DKIM, DMARC, SSL Certificates and has a perfect score by email testers.
Could I please get help delisting this IP? Thanks