Question : What is the proper way to add an SPF record to my Network Solutions account?

I have already created, and verified my SPF string. The problem is adding it to DNS on Network Solutions. Which HOST is the SPF supposed to point to?
In advanced DNS management on Network Solutions, it states
"SPF (Sender Policy Framework) records can be entered as TXT record."
I have added one, but when i use a 3-rd party SPF checker (such as http://www.politemail.com/check-spf.aspx) it says i do not have an SPF record. I have tried pointing the SPF to mail.testdomain.com, SPF.testdomain.com, txt.testdomain.com, and @(none).testdomain.com. None of which show up after running an SPF checker. Anyone know what HOST the SPF should point to?
Thanks.

Answer : What is the proper way to add an SPF record to my Network Solutions account?

The host should be blank, or none, or @. Host is a very poor name for the column, not that I can think of much of a better one.

Does it let you submit with @ (None) in there? If so, that is the value we need. That makes the record:

cladsys.com  IN TXT  v=spf1 ....

Which is exactly what we want because that's the domain we want the SPF record to operate for.

Chris