Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
sixthriver.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-18 16:37:04 UTC · ↺ Refresh
MX Hostnames
- sixthriver-com.mail.protection.outlook.com
MX Priorities
- sixthriver-com.mail.protection.outlook.com: 0
A / AAAA Records
- 172.67.211.90 (no PTR)
- 104.21.91.69 (no PTR)
- 2606:4700:3033::6815:5b45
- 2606:4700:3031::ac43:d35a
Mail Server IPs
- 52.101.194.13 ↩ mail-ch0pr04cu00605.inbound.protection.outlook.com
- 52.101.11.7 ↩ mail-sa9pr04cu00107.inbound.protection.outlook.com
- 52.101.8.42 ↩ mail-dm6pr03cu00402.inbound.protection.outlook.com
- 52.101.40.24 ↩ mail-cy5pr05cu00100.inbound.protection.outlook.com
- 2a01:111:f403:c92c::1 ↩ mail-dm6pr03cu00401.inbound.protection.outlook.com
- 2a01:111:f403:f804::3 ↩ mail-co1pr03cu00403.inbound.protection.outlook.com
- 2a01:111:f403:f913::1 ↩ mail-cy5pr05cu00101.inbound.protection.outlook.com
- 2a01:111:f403:f802::3 ↩ mail-sj0pr03cu01403.inbound.protection.outlook.com
SOA Record
Raw SOA
carol.ns.cloudflare.com dns.cloudflare.com 2398084190 10000 2400 604800 1800
Primary NS (mname)
carol.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2398084190
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s
Nameservers (NS)
carol.ns.cloudflare.com
merlin.ns.cloudflare.com
SPF Record
✓ Strict (-all)
v=spf1 ip4:71.40.45.162 ip4:108.252.1.161/29 include:spf.protection.outlook.com -all
📊 DNS lookups: 1/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✗ p=none
v=DMARC1; p=none; rua=mailto:[email protected]; ruf=mailto:[email protected]; fo=1;
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 2 found
selector1._domainkey
selector2._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
1 record- SPFv=spf1 ip4:71.40.45.162 ip4:108.252.1.161/29 include:spf.protection.outlook.com -all
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