Email Authentication

bttrack.com

SPF

pass

Declares which servers may send mail for this domain.

v=spf1 -all include:mailgun.org ~all

fail

Cryptographic signature on outbound mail (selector: default).

v=DKIM1; p=

pass

Tells receivers what to do with mail that fails SPF/DKIM. Policy: reject.

v=DMARC1;p=reject;sp=reject;adkim=s;aspf=s

10 mxb.mailgun.org

10 mxa.mailgun.org