Many thanks! Now I can do something which actually productive
this afternoon durings periods of other work avoidance ;)
On Mon, Jun 28, 2004 at 06:08:35PM +0100, Paul Howarth wrote:
Lou Katz wrote:
I control a number of inactive domains. They have proper DNS records, but
no A records nor MX records. Thus, they cannot receive mail, and many
MTAs might refuse to accept mail claiming to be from such domains, as
there are no valid return paths. I would like to publish the appropriate
spf records to indicate that they do not send mail.
Is it simply
IN TXT "spfv1 -all"?
Nearly; try this:
TXT "v=spf1 -all"
One possible addition to this would be an explanation page if you wish to
put one up on a web server. You could use something like this:
inactive1.dom. TXT "v=spf1
redirect=nomail.active.dom"
inactive2.dom. TXT "v=spf1
redirect=nomail.active.dom"
...
inactive999.dom. TXT "v=spf1 redirect=nomail.active.dom"
(lots of domains can use the same record)
nomail.active.dom. TXT "v=spf1
exp=spf-exp.nomail.active.dom -all"
spf-exp.nomail.active.dom. TXT "Mail from %{s} at %{i} rejected:
see http://www.active.dom/spf-reject-nomail.html";
Where http://www.active.dom/spf-reject-nomail.html is a page on your
website explaining that no mail is sent from those domains.
Cheers, Paul.
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