Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
mastermarble.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-23 06:23:27 UTC · ↺ Refresh
MX Hostnames
- mastermarble-com.mail.protection.outlook.com
MX Priorities
- mastermarble-com.mail.protection.outlook.com: 0
A / AAAA Records
- 65.60.11.250 ↩ concierge-tms.org
Mail Server IPs
- 52.101.11.9 ↩ mail-sn1pr02cu00101.inbound.protection.outlook.com
- 52.101.41.180 ↩ mail-byapr04cu00204.inbound.protection.outlook.com
- 52.101.10.16 ↩ mail-bn6pr21cu00500.inbound.protection.outlook.com
- 52.101.41.6 ↩ mail-sj0pr03cu01406.inbound.protection.outlook.com
- 2a01:111:f403:c902::16 ↩ mail-byapr04cu00306.inbound.protection.outlook.com
- 2a01:111:f403:f907::1 ↩ mail-dm1pr04cu00201.inbound.protection.outlook.com
- 2a01:111:f403:c902::5 ↩ mail-sj2pr05cu00505.inbound.protection.outlook.com
- 2a01:111:f403:c902::7 ↩ mail-sj0pr02cu00107.inbound.protection.outlook.com
SOA Record
Raw SOA
ns1.linode.com root.mastermarble.com 2021000004 14400 14400 1209600 86400
Primary NS (mname)
ns1.linode.com
Admin Email (rname)
root@mastermarble.com
Serial
2021000004
Refresh
14400s
Retry
14400s
Expire
1209600s
Minimum TTL
86400s
Nameservers (NS)
ns3.linode.com
ns2.linode.com
ns3.san-tan.com
ns4.san-tan.com
ns1.san-tan.com
ns4.linode.com
ns2.san-tan.com
ns5.linode.com
ns1.linode.com
SPF Record
✓ Strict (-all)
v=spf1 ip4:72.14.183.27 include:spf.protection.outlook.com -all
📊 DNS lookups: 1/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✗ MissingNo DMARC record — emails cannot be rejected on auth failure.
DKIM Selectors
✗ None detectedNo DKIM records found for common selectors — your provider may use a custom selector name.
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
1 record- SPFv=spf1 ip4:72.14.183.27 include:spf.protection.outlook.com -all
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