Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
challenger.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-21 00:55:56 UTC · ↺ Refresh
MX Hostnames
- challenger-com.mail.protection.outlook.com
MX Priorities
- challenger-com.mail.protection.outlook.com: 10
A / AAAA Records
- 172.66.149.151 (no PTR)
- 104.20.35.202 (no PTR)
- 2606:4700:10::ac42:9597
- 2606:4700:10::6814:23ca
Mail Server IPs
- 52.101.190.3 ↩ mail-yt6pr01cu00103.inbound.protection.outlook.com
- 52.101.190.2 ↩ mail-yt3pr01cu00602.inbound.protection.outlook.com
- 52.101.192.0 ↩ mail-yqzpr01cu00900.inbound.protection.outlook.com
- 52.101.192.1 ↩ mail-yqzpr01cu01001.inbound.protection.outlook.com
- 2a01:111:f403:c944:: ↩ mail-yqzpr01cu00900.inbound.protection.outlook.com
- 2a01:111:f403:c942::1 ↩ mail-yt3pr01cu00701.inbound.protection.outlook.com
- 2a01:111:f403:c942::2 ↩ mail-yt3pr01cu00602.inbound.protection.outlook.com
- 2a01:111:f403:c942::3 ↩ mail-yt6pr01cu00103.inbound.protection.outlook.com
SOA Record
Raw SOA
dane.ns.cloudflare.com dns.cloudflare.com 2399429725 10000 2400 604800 1800
Primary NS (mname)
dane.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2399429725
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s
Nameservers (NS)
nora.ns.cloudflare.com
dane.ns.cloudflare.com
SPF Record
✓ Strict (-all)
v=spf1 a:hybrid.challenger.com a:mail.challenger.com ip4:209.226.203.76 ip4:99.209.169.130 ip4:209.226.21.22 include:spf.protection.outlook.com include:_spf.atlassian.net -all
📊 DNS lookups: 4/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine; pct=100; rua=mailto:[email protected],mailto:[email protected]; adkim=s; aspf=s;
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Strict
· DKIM alignment: Strict
📧 Reports → mailto:[email protected],mailto:[email protected]
DKIM Selectors
✓ 4 found
selector1._domainkey
selector2._domainkey
s1._domainkey
s2._domainkey
✓ Public key: 216 chars (valid)
✓ DKIM properly configured for selector: selector1
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
10 records- atlassian-domain-verification=dbbabbVO3NoeCo/wRMyQPTUC7kPcvKuCovmVEaE5DW3q/Rs7O3k1yEHOniT5b09i
- atlassian-domain-verification=qzlDVYAqHz7y4qa5Jyyj0wYO4i4OymhVnWXUfTXlMR550rJ0J8xFm1l3DGBBgGrV
- atlassian-sending-domain-verification=807bed58-d9bb-4db6-927a-af3cf4b55ad3
- google-site-verification=7ziyVEI56Ody909O_NmKr5HEg3h_DhvxWFf2ph84jbI
- google-site-verification=TgzKg5piivsSApC57p_Mgp_dBIDrNvwbXMiyQDlYmn0*
- google-site-verification=pgTojZVEmBTJtqlftaM2EDQIMbGe-PFEV4JthYsUcEE
- SPFv=spf1 a:hybrid.challenger.com a:mail.challenger.com ip4:209.226.203.76 ip4:99.209.169.130 ip4:209.226.21.22 include:spf.protection.outlook.com include:_spf.atlassian.net -all
- MS=ms10334247
- RHvUf9x+sA/Fk1KO5o85tnG5vLjjQ3yKO1WMZ8BtF2eRjwq8z8c0TrcOv5Tf/ZEKuSwNBi/Z94r188gIrjiccQ==
- apple-domain-verification=7szV5SLpInaSW05H
Full email verification for challenger.com
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