SPF, DKIM, DMARC, MX, and CAA configuration
SPF
18
/25
DMARC
16
/30
DKIM
0
/20
MX
10
/10
CAA
0
/10
v=spf1 include:_spf.google.com ~allv=DMARC1; p=none; rua=mailto:webmaster@hoge.wsaspmx3.googlemail.com.aspmx4.googlemail.com.alt1.aspmx.l.google.com.aspmx2.googlemail.com.aspmx.l.google.com.alt2.aspmx.l.google.com.aspmx5.googlemail.com.