Email Security Analysis of redcross.is
Complete verification of redcross.is's SPF, DKIM, DMARC, and MTA-STS records. Find out if this domain is protected against email spoofing.
Last updated: April 14, 2026
SPF
OKv=spf1 include:spf.protection.outlook.com include:_spf.zenter.is include:mail.umsja.is include:spf-eu.mailssig.com include:_spf.salesforce.com include:spf.mandrillapp.com ip4:23.97.234.151 ip4:35.235.56.125 ip4:209.97.133.208 ip4:213.176.128.0/24 ip4:193.4.194.0/24 include:_spf.seen.io -allDKIM
OKSelectors: selector1, selector2, mandrill, s1, s2DMARC
OKv=DMARC1; p=reject; rua=mailto:47af186f02cb4307b7c31af05aa50ffb@dmarc-reports.cloudflare.netMX
OKredcross-is.mail.protection.outlook.comRecommendations
1Add MTA-STS to enforce TLS encryption for incoming emails
Without MTA-STS, an attacker performing a man-in-the-middle attack can downgrade the connection between mail servers to plaintext, intercepting emails in transit. MTA-STS tells sending servers to only deliver via TLS with a valid certificate, preventing downgrade attacks.
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Analyze redcross.is liveGuides to understand these results
SPF Guide
Understand how SPF defines which servers are authorized to send emails for a domain.
DKIM Guide
Discover how DKIM cryptographically signs your emails to guarantee their authenticity.
DMARC Guide
Learn how DMARC orchestrates SPF and DKIM to protect your domain.
MTA-STS Guide
Learn how MTA-STS enforces TLS encryption to protect your emails in transit.
SPF vs DKIM vs DMARC
Compare the three protocols and understand how they work together.