MX record

Google MX records
v=spf1 a mx ptr include:_spf.google.com -all

(7 days) 604800	MX	10	ASPMX.L.GOOGLE.com. 604800	MX	20	ALT1.ASPMX.L.GOOGLE.com. 604800	MX	30	ALT2.ASPMX.L.GOOGLE.com. 604800	MX	40	ASPMX2.GOOGLEMAIL.com. 604800	MX	50	ASPMX3.GOOGLEMAIL.com.

(1 day) 86400	MX	10	aspmx.l.google.com. 86400	MX	20	alt1.aspmx.l.google.com. 86400	MX	30	alt2.aspmx.l.google.com. 86400	MX	40	aspmx2.googlemail.com. 86400	MX	50	aspmx3.googlemail.com.