Email Authentication
att.net
SPF
passDeclares which servers may send mail for this domain.
v=spf1 include:_ipspf.yahoo.com ~all
DKIM
noneCryptographic signature on outbound mail (selector: none).
No record published.
DMARC
passTells receivers what to do with mail that fails SPF/DKIM. Policy: quarantine.
v=DMARC1; p=quarantine; fo=1; rua=mailto:dmarc_rua@emaildefense.proofpoint.com; ruf=mailto:dmarc_ruf@emaildefense.proofpoint.com
Mail Servers (MX)
10 mx-att.mail.am0.yahoodns.net