Protected Sky's RBL utilises advanced IP reputation checks to detect spam.
The RBL base name is 'bad.psky.me'.
For Example, a lookup on 127.0.0.2
User@Host:~$ dig 2.0.0.127.bad.psky.me +short 127.0.0.2 User@Host:~$
The RBL conforms to RFC5782
Currently, the RBL returns the following:
| Response | Meaning | Recommended Action |
|---|---|---|
| NOERROR | The IP address is question is fine for sending mail. | Accept the message |
| 127.0.0.2 | The IP address in question has been seen with a high rate of spam. | Defer the message for later. |
| 127.0.0.3 | The IP address in question has been seen to have a very high rate of spam. | Reject the message at SMTP submission. |