We started using a third party spam solution ( pointed our MX records to them) and since then some of our e-mails are being rejected
by are 2007 in house Exchange server. The exact error is below and shows up on our third party log file. I was told by the spam vendor that I need to turn off SPF checking on our Exchange server. In EMC at the Organization Config --> Hub Transport
--Anti Spam we have Sender ID set to "Stamp message with Sender ID result and continue processing." Is there another location on Exchange that SPF filtering is enabled?
Thanks,
| SMTP Delivery Result Failure | Connected to XX.XX.XX.XX but recipient was rejected. Remote host said: 550 SPF failure see http://spf.pobox.com/ (#5.7.1) |
Thanks,