I use Thunderbird for my email. As of lately, I'm constantly receiving plenty of spam from the same block of IP addresses. I cannot block them at the firewall (neither my own PC's firewall, nor the company) because the mail server is outside our network.
Asking the email provider to block the address range using their firewall is beyond my payroll - I cannot convince my manager of the need or usefulness of asking the email provider to do just that. Especially since, right now, I seem to be the only user receiving this cascade of spam.
Blocking by source domain is useless, as they're always using fake domains which don't even exist, but the source IP is clear:
- mail.tipoxco.com ([188.8.131.52])
- send.frishmusic.com ([184.108.40.206])
- db.carlascookbook.com ([220.127.116.11])
- server.eastburnart.com ([18.104.22.168])
Among many others, dozens per day. None of those pages exist, whois says that block of addresses is used by a company in Vietnam (a company dedicated fully to spamming, it seems?).
So I want to know: how can I create a filter by source mail IP in Thunderbird, so all the emails from 45.117.159.* go straight into Junk? (or better yet - so they get deleted immediately without me having to do that manually).
I'm willing to code my own scripts or install special add-ons if needs be, whatever. I just want to know which way can this be done, no matter if it's difficult or not so straight forward.