Email Authentication
expressvpn.works
SPF
passDeclares which servers may send mail for this domain.
v=spf1 mx a include:sendgrid.net include:_spf.google.com -all
DKIM
noneCryptographic signature on outbound mail (selector: none).
No record published.
DMARC
noneTells receivers what to do with mail that fails SPF/DKIM.
No record published.
Mail Servers (MX)
10 inbound-smtp.us-east-1.amazonaws.com