Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
master.de
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-19 12:46:27 UTC · ↺ Refresh
MX Hostnames
- master-de.mail.protection.outlook.com
MX Priorities
- master-de.mail.protection.outlook.com: 10
A / AAAA Records
- 185.88.214.94 ↩ srv-a-io.c-1148.maxcluster.net
- 2a00:f48:1008::214:94:10 ↩ srv-a-io.c-1148.maxcluster.net
Mail Server IPs
- 52.101.73.22 ↩ mail-am7pr05cu00106.inbound.protection.outlook.com
- 52.101.68.10 ↩ mail-dbbpr03cu00102.inbound.protection.outlook.com
- 52.101.68.15 ↩ mail-db6pr03cu00107.inbound.protection.outlook.com
- 52.101.73.19 ↩ mail-as8pr04cu00803.inbound.protection.outlook.com
- 2a01:111:f403:ca04::5 ↩ mail-db3pr0202cu00205.inbound.protection.outlook.com
- 2a01:111:f403:ca09:: ↩ mail-am3pr04cu00500.inbound.protection.outlook.com
- 2a01:111:f403:ca09::20 ↩ mail-as8pr05cu00400.inbound.protection.outlook.com
- 2a01:111:f403:ca09::1 ↩ mail-as9pr07cu00301.inbound.protection.outlook.com
SOA Record
Raw SOA
nameserver-1-io.maxcluster.net info.maxcluster.net 2025021106 3600 1000 1209600 600
Primary NS (mname)
nameserver-1-io.maxcluster.net
Admin Email (rname)
info@maxcluster.net
Serial
2025021106
Refresh
3600s
Retry
1000s
Expire
1209600s
Minimum TTL
600s
Nameservers (NS)
nameserver-1-io.maxcluster.net
nameserver-2-io.maxcluster.net
SPF Record
✓ Strict (-all)
v=spf1 a include:spf.protection.outlook.com -all
📊 DNS lookups: 2/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine; rua=mailto:[email protected]; ruf=mailto:[email protected]; fo=0; adkim=r; aspf=r; pct=100; rf=afrf; ri=86400
~ Quarantine — good protection (failing mail goes to spam)
📋 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 a include:spf.protection.outlook.com -all
Full email verification for master.de
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