Firefox Relay makes it easy to create email masks that forward your messages to your true inbox. Use them to protect your online accounts from hackers and unwanted messages.
suggested: block smartlock.google.com
Buried in here is mention of disconnect.me, which seems to have separate blocklists for ads, tracking, and malware.
Found directions on running this on OpenBSD. I think I can substitute curl for fetch, rather than ftp.
One of the sources it uses is FadeMind's hosts.extras, which sources a lot of third party host lists, some of which are very focused.
Ads can be annoying in a lot of cases. If you're grown frustrated by ads on the Internet, here's how you can block ads on Android.
Ad blocking and filtering for multiple platforms
Also possible to use them as a filtered DNS provider
IPBan: https://www.digitalruby.com/ipban/ [Windows/Linux only]
SSHguard: http://www.sshguard.net
Sentry? https://github.com/msimerson/sentry/ [Perl, not sure how automated it is]
I just put addresses in the file specified by check_recipient_access with REJECT
Talkatone http://www.talkatone.com
TextNow http://www.textnow.com - also offers mobile service, similar to Republic Wireless
GrooveIP https://snrblabs.com/GrooVeIp - Android only, limited use for free
Visual voicemail and robocall blocking
YouMail https://www.youmail.com
My Visual Voicemail https://play.google.com/store/apps/details?id=com.vna.service.vvm
CallControl/EveryCall https://www.callcontrol.com/
Truecaller https://www.truecaller.com/
Should I Answer? https://www.shouldianswer.net/
Nomorobo http://nomorobo.com/ free for (some) voip lines
Hiya https://www.hiya.com/products/app recommended by AT&T, freemium
good for stopping stuff that phones home, from web bugs and ads to sneaky IoT devices
$5/month as of 2023