What Does Blacklist Mean?
A blacklist, in the context of computing, is a list of of domains or email addresses for which delivery of emails is blocked. When this occurs, a user is unable to send a message to the intended recipient. Email delivery management tools can be instituted to circumvent blacklisting.
Blacklisting also takes place when one IP address has been blacklisted. In these instances, the blacklisting can spread to other domains.