Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
zfstax.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-19 09:26:10 UTC · ↺ Refresh
MX Hostnames
- zfstax-com.mail.protection.outlook.com
MX Priorities
- zfstax-com.mail.protection.outlook.com: 0
A / AAAA Records
- 54.85.200.131 ↩ ec2-54-85-200-131.compute-1.amazonaws.com
- 54.164.9.107 ↩ ec2-54-164-9-107.compute-1.amazonaws.com
Mail Server IPs
- 52.101.194.4 ↩ mail-ch4pr04cu00104.inbound.protection.outlook.com
- 52.101.9.17 (no PTR)
- 52.101.9.20 ↩ mail-bl0pr02cu00604.inbound.protection.outlook.com
- 52.101.10.10 ↩ mail-bn8pr05cu00102.inbound.protection.outlook.com
- 2a01:111:f403:c946::5 ↩ mail-ch4pr21cu00105.inbound.protection.outlook.com
- 2a01:111:f403:c927::1 ↩ mail-bn8pr05cu00301.inbound.protection.outlook.com
- 2a01:111:f403:c922::1 ↩ mail-bl0pr05cu00501.inbound.protection.outlook.com
- 2a01:111:f403:f90d:: ↩ mail-sn1pr0501cu00200.inbound.protection.outlook.com
SOA Record
Raw SOA
ns1.bdm.microsoftonline.com azuredns-hostmaster.microsoft.com 1 3600 300 2419200 300
Primary NS (mname)
ns1.bdm.microsoftonline.com
Admin Email (rname)
azuredns-hostmaster@microsoft.com
Serial
1
Refresh
3600s
Retry
300s
Expire
2419200s
Minimum TTL
300s
Nameservers (NS)
ns1.bdm.microsoftonline.com
ns2.bdm.microsoftonline.com
ns3.bdm.microsoftonline.com
ns4.bdm.microsoftonline.com
SPF Record
✓ Strict (-all)
v=spf1 include:spf.protection.outlook.com -all
📊 DNS lookups: 1/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
⚠ No aggregate reports (rua= not set)
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
6 records- +dTBUK5N/kmh6JbU5+Ah/w==
- SPFv=spf1 include:spf.protection.outlook.com -all
- openai-domain-verification=dv-bOyTXOaDSdyvIAFxyWDrmU2E
- atlassian-domain-verification=PXTiKR20GTucncqTGABcktFtcXBa5p3sjAPShijexbNnSbQbTps5ZmtXkDKGRZ7X
- atlassian-sending-domain-verification=2ce128ce-aea9-4166-af1b-1f3b3d547804
- mscid=NQuT87ZZGGT2S9y+loNADWFd7FSQ9YrVwmqAxU+FBc9gazbAafFihoF8U83/jP+QvRAg3ZKgFpROkLjO93RpfQ==
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