What do I do if my email is rejected due to RBL?

If your email has rejected due to an RBL (Real-time Blackhole List), then please follow the steps below so you can send the email:

  1. The IP address will be in the error.
  2. Once you have found the IP address, scan any machines/devices related to that IP address and remove any malware/spyware/viruses.
  3. Go to https://lookup.abusix.com/ to see which RBLs the IP address is on and request de-listing from the appropriate section.
  4. After de-listing the IP address, you will be able to send the email again.