spf?

[dep]

quoth Net Llama!:
| On Mon, 1 Mar 2004, dep wrote:
| > greetings, crowd . . .
| >
| > time for me to undertake another breathtaking display of ignorance.
| >
| > i'm on a cable modem and have used sendmail for the most part for
| > years. problem is, more and more isps are blacklisting whole blocks
| > of cable modem addresses.
| >
| > what i'm trying to figure out is whether spf would be of any use
| > here, on my machine, or whether it is something that, really, has
| > nothing to do with me. i've endeavored to read what i can on the
| > subject, but most of it is, like so much documentation, written in
| > a way that suggests arriving at the game at about halftime.
| >
| > anybody know about spf and what good it might be in a situation
| > like mine? or is it something that would need to be done at the isp
| > level?
|
| Do you have authoritative control over your DNS record(s)?  If not,
| then SPF isn't for you.

a dandy question. do i? i'm on a plain vanilla cable modem connection. 
i'm not even certain how i'd find out.
-- 
dep

Hippocratic oath: An ethical construct whose initial tenet, "first, do 
no harm," prohibits doctors from treating lawyers.