Lookup tree for spfc._spf.cisco.com

v=spf1 ip4:64.101.210.224/28 ip4:173.37.227.240/28 ip4:173.37.135.112/28 mx:res.cisco.com mx:sco.cisco.com ~all

• mx:res.cisco.com (lookup #1)

  < supports up to 10 MX hostnames >
• mx:sco.cisco.com (lookup #2)

  < supports up to 10 MX hostnames >