Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
marathonus.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-20 23:38:00 UTC · ↺ Refresh
MX Hostnames
- marathonus-com.mail.protection.outlook.com
MX Priorities
- marathonus-com.mail.protection.outlook.com: 0
A / AAAA Records
- 40.114.51.68 (no PTR)
Mail Server IPs
- 52.101.10.18 ↩ mail-bn8pr05cu00302.inbound.protection.outlook.com
- 52.101.9.17 (no PTR)
- 52.101.9.0 ↩ mail-bl2pr02cu00100.inbound.protection.outlook.com
- 52.101.50.7 ↩ mail-co1pr21cu00207.inbound.protection.outlook.com
- 2a01:111:f403:f908:: ↩ mail-bn1pr21cu00100.inbound.protection.outlook.com
- 2a01:111:f403:f90f:: ↩ mail-sa9pr04cu00100.inbound.protection.outlook.com
- 2a01:111:f403:f913::1 ↩ mail-cy5pr05cu00101.inbound.protection.outlook.com
- 2a01:111:f403:c902::7 ↩ mail-sj0pr02cu00107.inbound.protection.outlook.com
SOA Record
Raw SOA
ns1-06.azure-dns.com marathonus.com 2016103101 86400 3600 777600 3600
Primary NS (mname)
ns1-06.azure-dns.com
Admin Email (rname)
marathonus@com
Serial
2016103101
Refresh
86400s
Retry
3600s
Expire
777600s
Minimum TTL
3600s
Nameservers (NS)
ns3-06.azure-dns.org
ns4-06.azure-dns.info
ns1-06.azure-dns.com
ns2-06.azure-dns.net
SPF Record
✓ Strict (-all)
v=spf1 include:mailgun.org include:spf.protection.outlook.com include:servers.mcsv.net -all
📊 DNS lookups: 3/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
⚠ No aggregate reports (rua= not set)
DKIM Selectors
✓ 3 found
selector1._domainkey
selector2._domainkey
k1._domainkey
✓ Public key: 392 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
3 records- MS=ms39137104
- atlassian-domain-verification=S2qgjPXPpiI7AAHQRlc5nI7GI47QrEbcsruiHCFX3eUZV1t0uaWhlFwCyHmx-QlF
- SPFv=spf1 include:mailgun.org include:spf.protection.outlook.com include:servers.mcsv.net -all
Full email verification for marathonus.com
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