[IP address found on cloud blacklist 1]

Thank you Marcos, this was very helpful.

 

[IP address found on cloud blacklist 1]

Hello,

One of our customers had issues with mail delivery. Their e-mails couldn't be delivered to certain companies that are using ESET antivirus. The reason why the e-mails were rejected:
IP(x.x.x.x) found on cloud black list 1.
The IP address that has been blacklisted is the address of one of our shared hosting servers.
Could you please share a link where we can check if our IP address is blacklisted and how we can be de-listed?

Kind Regards,
Ivan