On 14 dec 2006, at 20.40, Gino Cerullo wrote:
I presume the answer you gave is an admission that you are, in fact, using email forwarding as the method behind your spam filtering system.
The link from perkel.com -> junkemailfilter.com is pretty self explanatory. It all makes sense now...
Marc: Since you already require that your customers modify their MX records to have their email sent to your servers, why not update / add the appropriate SPF records at the same time? That would prevent any problems caused by SPF checks.
j o a r