spf2.0/pra include:cust-senderid.exacttarget.com a:mta.communications.cu.edu a:communications.cu.edu ip4:204.228.68.0/22 -all
v=spf1 include:cust-spf.exacttarget.com a:mta.communications.cu.edu a:communications.cu.edu ip4:204.228.68.0/22 ip4:128.138.128.231 ip4:128.138.128.232 ip4:128.138.128.233 ip4:128.138.67.74 ip4:128.138.67.75 ip4:128.138.67.85 -all