o2.com email security: SPF, DKIM & DMARC
Is o2.com spoofable? See o2.com's SPF, DKIM, DMARC and MTA-STS records and find out if this domain is protected against email spoofing.
Last updated: June 3, 2026
SPF
OKv=spf1 ip4:158.230.101.102 ip4:192.228.1.9 ip4:194.228.112.214 ip4:82.113.113.130 ip4:200.81.36.136 ip4:200.81.36.137 ip4:200.81.42.136 ip4:200.81.42.137 ip4:81.47.204.72/29 ip4:195.76.34.104/29 ip4:160.218.161.64/28 ip4:160.218.11.32/29 ip4:81.45.59.242 ip4:158.230.100.102 ip4:82.113.101.1 ip4:82.113.101.16/28 ip4:109.169.13.24 ip4:158.230.101.187 ip4:158.230.101.188 ip4:158.230.201.10 ip4:158.230.201.11 ip4:158.230.100.106 ip4:158.230.101.221 ip4:158.230.101.222 ip4:158.230.101.207 ip4:158.230.201.24 ip4:158.230.201.25 ip4:158.230.201.26 ip4:80.71.18.206 ip4:46.233.118.164 ip4:212.170.36.114 include:spf.protection.outlook.com include:_netblocks.eloqua.com include:_spf.atoracle.com include:spf-3p-1.o2.com -allDKIM
OKSelectors: cmDMARC
Warningv=DMARC1; p=quarantine; rua=mailto:dmarc-rua@o2.com; ruf=mailto:dmarc-ruf@o2.comMX
OKdmell-seg-03.o2.com, dmmlw-seg-02.o2.com, dmell-seg-04.o2.com, dmmlw-seg-01.o2.comRecommendations
1Upgrade your DMARC policy from p=quarantine to p=reject for full blocking
With p=quarantine, spoofed emails are sent to spam instead of being blocked outright. Some recipients still check spam folders, and sophisticated attacks can be flagged as legitimate by users. p=reject ensures fraudulent emails never reach any folder.
2Add 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.
Run a live analysis
The results above are updated daily. For an instant check of o2.com, run a live analysis.
Analyze o2.com liveFrequently asked questions about o2.com
Is o2.com spoofable?
No. o2.com is protected against email spoofing with a robust configuration. Email security score: 82/100 (grade B).
Does o2.com have an SPF record?
Yes, o2.com publishes an SPF record (-all qualifier).
What is o2.com's DMARC record?
o2.com publishes a DMARC record (_dmarc.o2.com) with a p=quarantine policy.
Does o2.com use DKIM?
Yes, DKIM signatures were detected for o2.com.
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Guides 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.