Email Authentication

att.net

SPF

pass
Declares which servers may send mail for this domain.
v=spf1 include:_ipspf.yahoo.com ~all

DKIM

none
Cryptographic signature on outbound mail (selector: none).
No record published.

DMARC

pass
Tells 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