i now have three /8 blocks in my email filters.
220.127.116.11/8 in the UK, 18.104.22.168/8 in germany, and 22.214.171.124/8 in japan.
the “standard” email filters, built on “and/or” and “contains/does not contain”, break down when you’re dealing with 16.75 MILLION addresses.
they break down because you can’t just filter on 25. which appears in the middle and end of IP addresses, in message ID numbers, and, occaisionally, in the body of the message.
the result is A LOT of false positives: email which i can’t forward to the correct recipient, because it will get filtered AGAIN…
which is quite annoying. 😒
finds a white space character followed by “25.”, followed by three repititions of one to three digits, interspersed by periods, followed by another white space character.
technically, this regex could be adapted to accomodate any IP address, which means that, theoretically, i have a whole new, easier, and faster method of processing spam. 😈
the next step is to learn how to search for a specific range of digits… 😈