The main idea is that smtpctl spf walk will read a list of domains from stdin and output a list of IP addresses and ranges to stdout, allowing it to be used in scripts, to generate file lists, or to be piped directly into pfctl to feed a table.
The title of this post should be "Spam Filtering on OpenSMTPD", but i didn't want to define the my home page with that word. Running an e-mail server is a challanging and low-reward task, so we need to keep this as simple as we possibly can. This is I classify mail using SpamAssasin these days.
Hastymail2 is a full featured IMAP/SMTP client written in PHP. Our goal is to create a fast, secure, compliant web mail client that has great usability. Hastymail2 is much more lightweight than most popular web based mail applications but still maintains a competitive feature set.