A Free Modern RBL

Protected Sky's RBL utilises advanced IP reputation checks to detect spam.


Using the RBL

The RBL base name is 'bad.psky.me'.

For Example, a lookup on

User@Host:~$ dig +short

The RBL conforms to RFC5782


Currently, the RBL returns the following:

ResponseMeaningRecommended Action
NOERRORThe IP address is question is fine for sending mail.Accept the message IP address in question has been seen with a high rate of spam.Defer the message for later. IP address in question has been seen to have a very high rate of spam. Reject the message at SMTP submission.