I've only been running it for about a year, but I simply don't get spam --- perhaps partially because it isn't my main email address. I went by this article, h

I've only been running it for about a year, but I simply don't get spam --- perhaps partially because it isn't my main email address. I went by this article, https://www.c0ffee.net/blog/mail-server-guide/ https://www.c0ffee.net/blog/mail-server-guide/ but I only set up Postfix and the various DNS records (MX, DKIM, etc.). I didn't set up Dovecot because I just use Mutt on the same server. And I haven't bothered to set up any kind of spam filter.