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Stephan Golux wrote:
[...]
My cpanel setup forwards all email destined for
"client(_at_)client(_dot_)org" to
"client(_at_)client-isp(_dot_)com". But the outside world doesn't know that.
My client's ISP subscribes to SPF.
Which is good.
THe party sending mail to my client publishes an SPF record.
Which is good, too.
But since the email visits my intervening forwarding virtual host, the
client ISP bounces the mail because "virtual.com" is not an authorized
sender for "sender-isp.com".
So I feel between a rock and a hard place. I am following all RFCs on
sending and forwarding mail, but I seem to have no way to serve my
client legitimately except to recommend that he move to an email service
that does NOT use SPF.
Any suggestions?
Since you as your client's forwarder don't do sender address rewriting
(SRS etc.), the client(_at_)client(_dot_)org ->
client(_at_)client-isp(_dot_)com forwarding you
have set up for him is conceptually part of his receiving e-mail infra-
structure. So why does your client (through his ISP) perform SPF checks
on messages received from parts of his own e-mail infrastructure?
Your client should ask his ISP not to SPF-check messages that are received
from virtual.com and have RCPT TO:<client(_at_)client-isp(_dot_)com>.
Or you could choose to be a forwarder independent from client.org and start
doing sender address rewriting for forwarded mail.
In any case, you are far from between a rock and a hard place, but you'll
have to respect sender-isp.com's wish that their domain not be used as the
envelope sender by independent forwarders.
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