3ph2._spf.paypal.com has no MX records.
Question and response
Question
dig 3ph2._spf.paypal.com. MX
Answer
The response has no answer records.
Authority
paypal.com. 300 SOA ppdns.paypal.com. hostmaster.paypal.com. 2012395532 7200 600 1209600 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0