Email Authentication
polaris-iot.com
SPF
passDeclares which servers may send mail for this domain.
v=spf1 include:_spf.yandex.net include:spf.mail.selcloud.ru include:amazonses.com ~all
DKIM
passCryptographic signature on outbound mail (selector: mail).
v=DKIM1; k=rsa; t=s; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCzuhkkLy+sltxJbydGVoRV6sMNOq7BprZZCAnJx9gbp/7ulcKF2lG4JgObymwqpqu8j8BuzuY+9TPr7EMEzqc+d0/YlVdp2QdIyjv4UswydnK7UB2/GI7yv12qQ4p/X1H8yEFuDvy0ez+aSz7L/ou27uaEpxXgGXvDHDsJyr9kwQIDAQAB
DMARC
passTells receivers what to do with mail that fails SPF/DKIM. Policy: quarantine.
v=DMARC1; p=quarantine
Mail Servers (MX)
10 mx.yandex.net