Email Authentication

captcha.com

SPF

pass

Declares which servers may send mail for this domain.

v=spf1 mx a:captcha.com ip4:46.4.221.230  include:spf.protection.outlook.com  -all

none

Cryptographic signature on outbound mail (selector: none).

No record published.

pass

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

v=DMARC1; p=reject; rua=mailto:captcha@captcha.com; pct=100; adkim=s; aspf=s

10 smtp.captcha.com