As you may have noticed, above you will find words for "A technique for blocking spam (junk e-mail) by configuring a non-existent server as the primary MX record, so that initial contact always fails. A legitimate sender is likely to try the next server, which should succeed.". Hover the mouse over the word you'd like to know more about to view its definition. Click to find a better fitting word. Finally, thanks to ChatGPT, the overall results have been greatly improved.