> I'm concerned that email content encryption would break basically all anti-spam technologies I've self-hosted mail for years and only received 2 or 3 spam me

> I'm concerned that email content encryption would break basically all anti-spam technologies I've self-hosted mail for years and only received 2 or 3 spam messages in all this time. I ignore content analysis entirely, instead focusing on: * DNSBLs such as Spamhaus, and * DROP and eDROP (from Spamhaus), and fullbogons (from Team Cymru), and * FCrDNS + whitelisting for legit senders lacking it, and * block certain "blackhat" DNS providers, and * do "nolisting" (see: nolisting.org), and * (either) greylisting, such as OpenBSD's spamd, * (or) greet delay + whitelisting, if not using greylisting Requiring FCrDNS exposes a large number of incompetent senders, making it an "extreme" method that entails some babysitting. Requiring rDNS is good, and far less likely to cause issues. Employing the above methods reduces spam so dramatically that the benefits of E2E encryption FAR outweigh the drawback of lacking content analysis.