This question is about publishing SPF records in our DNS. We currently send mail from two places: an MS Exchange server, and an online app. The website sends mail through our ISP's SMTP server.
Our current TXT record is: "v-spf1 redirect=exchangeserver.com", where "exchangeserver.com" is the domain of our Exchange provider. I would like to integrate the domain of our ISP into this record, as it is also sending mail on our behalf.
Question 1: do I create another separate TXT record for our domain, or add new details to the current record?
Question 2: does the "redirect" exclude directive exclude any other additions to the current record?
I would like to do something along the following lines and want to know if this is valid:
"v=spf1 ip4:IP-of-ISP redirect=exchangeserver.com"