No... We are actually interested in IP addresses of sending mail
servers. mail.webringworld.org is just an alias for webringworld.org (so
you can say that they have the same IP address), and the host
smtp.webringworld.org doesn't exist. Richard may want to further explain
his SPF record.
I just used the tool at the spf web site and entered my sending ips and
domains. The record is what resulted. Do I truly understand it? Probably
not. My goal was to get something in my zones (200 of them) that seemed
to make sense, then I could change them later with a search/replace
utliity if necessary. I wasn't really concerned with 100% perfection
yet, just getting my first stab in the zones (that was the hard part,
a hand-edit of the 200 zone files).
Richard