Domain Overview
DNS: ✓ 17h ago
Checker: ✓ 17h ago
backbone.io
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-05-20 18:45:12 UTC · ↺ Refresh
MX Hostnames
- backbone-io.mail.protection.outlook.com
MX Priorities
- backbone-io.mail.protection.outlook.com: 0
A / AAAA Records
- 91.118.154.109 ↩ xserv09.internex.at
Mail Server IPs
- 52.101.68.15 ↩ mail-db6pr03cu00107.inbound.protection.outlook.com
- 52.101.68.25 ↩ mail-db8pr02cu00101.inbound.protection.outlook.com
- 52.101.73.30 ↩ mail-am7pr05cu00306.inbound.protection.outlook.com
- 52.101.73.8 ↩ mail-am0pr04cu00500.inbound.protection.outlook.com
- 2a01:111:f403:ca04::10 ↩ mail-dbapr03cu00100.inbound.protection.outlook.com
- 2a01:111:f403:ca04::c ↩ mail-db9pr02cu00204.inbound.protection.outlook.com
- 2a01:111:f403:ca09::c ↩ mail-as8pr05cu00304.inbound.protection.outlook.com
- 2a01:111:f403:ca04::6 ↩ mail-db4pr02cu00406.inbound.protection.outlook.com
SOA Record
Raw SOA
ns1.internex.at info.internex.at 2025013112 43200 7200 1209600 86400
Primary NS (mname)
ns1.internex.at
Admin Email (rname)
info@internex.at
Serial
2025013112
Refresh
43200s
Retry
7200s
Expire
1209600s
Minimum TTL
86400s
Nameservers (NS)
ns3.internex.at
ns4.internex.at
ns2.internex.at
ns1.internex.at
SPF Record
✓ Strict (-all)
v=spf1 mx ip4:91.118.154.109 include:spf.protection.outlook.com -all
📊 DNS lookups: 2/10
✓ 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: 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=ms32577408
- SPFv=spf1 mx ip4:91.118.154.109 include:spf.protection.outlook.com -all
- ca3-0c02f2fd36a241349ccc8eb4c2363dbe
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