Be Excellent To Each Other

Clever Internet DNS peeps:

Am I right in thinking that, when inserted into a client of our's domain DNS records, this SPF record:



will allow all of their listed mail servers (in the MX records of their domain) to send e-mail (the "mx" part of the SPF) and will also allow our domain (on our IP address) to send e-mail claiming to be from their domain too?

Thx!

We use

Which is mostly the same, but for two servers. We've got -all rather than ~all (hard fail rather than soft fail), though, and an 'a' and 'ptr', both of which refer to different types of verification (mx is one, too).

Simple answer, though - yes.

Hurrah - someones posted the real answer so I can say

"Okay, I'll change it, then! Hello Cliff Richard!"

SPG is a sensible name, of course.

And is also the name of our hosting server at work.