Due to some misconfigurations, your asset may not reach the target. Check if your IP address or domain is blacklisted or not.
Blacklist is a list that an IP address or domain is entered for reasons such as deliberately or unconsciously sending spam mail, spreading a virus or making a sending activity. What is Asset blacklist check? The asset blacklist check will show if the domain or IP entered consequently listed with DNSBL or SURBL systems.
Right here and now you can check to see if your asset is listed on an anti-spam database.
If your asset blacklisted, you need to contact with the blacklist operators. There are couple of steps to get your reputation back such as proving that you are not using your asset for malicious purposes.