Following up on previous, the LinkedIn discussion revealed that there are people who have not heard about greylisting.

So here is my 2012 piece with updates, "In The Name Of Sane Email: Setting Up OpenBSD's spamd(8) With Secondary MXes In Play - A Full Recipe" https://nxdomain.no/~peter/in_the_name_of_sane_email.html

#spamd #antispam #spamd.conf #OpenBSD #blocklists #blacklists #greytrapping #greylisting #spam