There is nothing easier to determine if your domain is blacklisted. There are a sufficient number of on-line services that allow you to find out the reputation of your mail server on the entered domain name or IP address.
For example, check the domain name mxtoolbox.com on the same-name online service mxtoolbox.com.
To do this, go to mxtoolbox.com and see the field for entering a domain name or IP address.
Enter the name “mxtoolbox.com” in the field and click the “Blacklist check” button.
After the verification is completed, we can see the report.
In this example, the domain name mxtoolbox.com is not contained in any of the blacklists and has an excellent reputation.