thanks for the info. ntl.lotas-smartman.net is automaticly updated
when the address changes, so that could work. so that "v=spfv1
ip4:81.98.88.0/24 -all" is all i should put in, yea? and how would i
go about adding a second set of ips? add a second ip4:whatever?
Thanks again for the info!
On Thu, 3 Jun 2004 06:29:11 -0600, Michael R. Brumm
<me(_at_)michaelbrumm(_dot_)com> wrote:
dbln.cable.ntl.com doesn't have an SPF record, so I think you might be
confused as to how the "include" mechanism works.
Is "ntl.lotas-smartman.net" automatically updated via DDNS whenever your IP
address changes? If so, your TTL is 20 minutes, so potentially your mail
could fail SPF evaluations on some servers for 20 minutes after your IP
address change.
If you can't do DDNS, you could just use the "ip4" mechanism to include the
address space your dynamic IP is allocated from.
For example, if your IP address is always allocated from:
IP: 81.98.88.1-254
netmask: 255.255.255.0
You could do this:
"v=spf1 ip4:81.98.88.0/24 -all"
If your IP address can come from multiple ranges, just include each. You
could call your ISP to find these out. Obviously, this allows anyone in those
subnets to forge your domain, but it's better than nothing. Ideally you want
a static IP or at least relay through a mail server with a static IP.
Michael R. Brumm
-------
Sender Policy Framework: http://spf.pobox.com/
The Inbox Event at the Marriott San Jose features SPF.
June 2: Email Accountability Symposium (free)
June 3: SPF Strategy BOF (free) where industry will coordinate deployment
timeline
Times: 6:30pm - 8pm, both sessions. http://www.inboxevent.com/
Archives at http://archives.listbox.com/spf-discuss/current/
To unsubscribe, change your address, or temporarily deactivate your
subscription,
please go to
http://v2.listbox.com/member/?listname=spf-discuss(_at_)v2(_dot_)listbox(_dot_)com