|Building The Network You Need With PF, The OpenBSD Packet Filter: BSDCan 2016, Ottawa, Canada, June 8th 2016|
Spammers are a pain. How do we deal?
Spammers send large numbers of messages; you are probably not the first recipient
- > Known spam senders (hijacked machines) are added to blacklists
Spammers tend not to obey RFCs (RFC1123, RFC2821/RFC5321)
- > Greylisting (www.greylisting.org) - with 45n temporary error still works!
An elegant solution is in OpenBSD's base system. Let's take a peek.