First, thanks for giving us real domain names to work with.
On 20-Jan-10, at 2:43 PM, Barry Say wrote:
The problem I encountered was that the user had changed his ISP
provider but is still using his old email address. So that an e-mail
apparently from tiscali.co.uk is coming from a bt.com server. Truly
an SPF failure and entirely beyond my control.
Interesting! If he changed ISP and is using his old email address how
is he getting his email replies to that old address? Hmmmm!
Anyway, yes since 'tiscali.co.uk' publishes an SPF policy (with -all
no less) then any mail coming from '@tiscali.co.uk' will surely fail
if it originates from a 'bt.com' mail server.
I can indeed find out the mail servers which are being used to send
northumbrianpipers.org.uk e-mails and add them to my SPF records.
That was what I had thought of doing, but I wondered if there was a
simpler way.
Well, since 'northumbrianpipers.org.uk' does not publish an SPF
policy, you can't simply use an 'include' which would have made things
easier. You'll have to contact them instead.
I conclude that there is a real difficulty on the horizon as SPF
rolls out. Until now, I for one haven't really cared which smtp
server I used for outgoing mail. With multiple e-mail accounts, I
have simply used the smtp server over which I have most control. I
now find that both the e-mail programs I use, Thunderbird and
Pegasus now change their SMTP settings with identity and I am just
trying to get a working outlook express to see how that works (sigh!)
We haven't lived in that 'carefree' world for a few years now.
Unfortunately, that's the world we live in. A perfectly good, if not
completely secure, email system gets abused my criminals and we have
to jump through hoops to work around it's faults.
You seem to be on the right track and you've been given enough info to
figure out a solution that works for you and your users so all I can
add is good luck, we feel your pain.
Thanks a lot
Barry
--
Gino Cerullo
Pixel Point Studios
21 Chesham Drive
Toronto, ON M3M 1W6
416-247-7740
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