Tutorials

  1. 3 min read

    In addition to using a spam filtering program like SpamAssassin, you can use remote block lists (RBLs, also called DNSBLs) to look for spam in your incoming email. RBLs are lists of IP addresses that are associated with spam email. Your server asks an RBL if the email sender IP is on its list of spam addresses. If it is, your server’s settings can reject the message and send it back with an error, accept the message and tag it for further spam filtering, or accept the message and deliver it to your inbox.