Sounder mailing list - reply if you want it back

[Harry Strongburg]

On Sun, Jun 05, 2011 at 08:45:59AM -0500, Jordon Bedwell wrote:
> On 6/5/2011 8:31 AM, Harry Strongburg wrote:
> > On Sun, Jun 05, 2011 at 01:56:53PM +0100, Alan Pope wrote:
> >> I did NOT send this mail.
> > 
> > Then perhaps you should look into setting a proper SPF record on your 
> > domain <http://www.openspf.org/>. After doing so, any properly 
> > configured mailing list software will automatically decline the mail, if 
> > the sender IP was not on your SPF whitelist.
> 
> Something like "v=spf1 a:domain.tld/20 ~all" should work quite well.

Negative. As far as I am aware, you shouldn't use "~" in production 
unless:
1) you are unsure you are configuring SPF properly (~ is "accept 
but mark"),
or
2) have some use where you can't be sure all your IPs are 
whitelisted/changing a lot (usually in the case of larger companies).

~all will result in softfail, which most mailservers will still accept 
(even if the IP address is not whitelisted), but will probably result in 
it being flagged as possible spam. For a personal email domain that you 
don't have a ton of users and don't have a large dynamic pool, you 
should prefer to use -all. -all will result in a fail/reject, and it 
won't be delivered if the mailserver is properly configured.

PS: your emails are all softfailing, as your cox IP isn't whitelisted... 
you might want to fix that, and maybe change ~all to -all :)