sixtus-partner.de

Valid Email Server
Domain Lookup › sixtus-partner.de

Domain Overview

DNS: ✓ 1mo ago Checker: ✓ 1mo ago
sixtus-partner.de
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-04-06 15:25:35 UTC · ↺ Refresh

MX Hostnames

  • sixtuspartner-de01e.mail.protection.outlook.com
  • mx00.kundenserver.de
  • mx01.kundenserver.de

MX Priorities

  • mx00.kundenserver.de: 3610
  • mx01.kundenserver.de: 3611
  • sixtuspartner-de01e.mail.protection.outlook.com: 3600

A / AAAA Records

  • 198.49.23.144
  • 198.185.159.144
  • 198.49.23.145
  • 198.185.159.145

Mail Server IPs

  • 212.227.15.41 ↩ mx00.kundenserver.de
  • 217.72.192.67 ↩ mx01.kundenserver.de
  • 52.101.68.5 ↩ mail-du2pr03cu00105.inbound.protection.outlook.com
  • 52.101.73.153 ↩ mail-as8pr05cu00401.inbound.protection.outlook.com
  • 52.101.73.16 ↩ mail-as2pr05cu00100.inbound.protection.outlook.com
  • 52.101.73.15 ↩ mail-am9pr04cu00107.inbound.protection.outlook.com
  • 2a01:111:f403:ca04::2 ↩ mail-du2pr03cu00102.inbound.protection.outlook.com
  • 2a01:111:f403:ca04::1 ↩ mail-db7pr03cu00401.inbound.protection.outlook.com
  • 2a01:111:f403:ca09::20 ↩ mail-as8pr05cu00400.inbound.protection.outlook.com
  • 2a01:111:f403:ca04::5 ↩ mail-db3pr0202cu00205.inbound.protection.outlook.com

SOA Record

Raw SOA ns1074.ui-dns.biz hostmaster.1and1.com 2017101723 28800 7200 604800 300
Primary NS (mname)
ns1074.ui-dns.biz
Admin Email (rname)
hostmaster@1and1.com
Serial
2017101723
Refresh
28800s
Retry
7200s
Expire
604800s
Minimum TTL
300s

Nameservers (NS)

ns1074.ui-dns.biz
ns1114.ui-dns.com
ns1083.ui-dns.org
ns1073.ui-dns.de

SPF Record

✓ Strict (-all)
v=spf1 include:spf.protection.outlook.com -all
📊 DNS lookups: 1/10
✓ Hard fail (-all) — strict enforcement

DMARC Record

✗ Missing

No DMARC record — emails cannot be rejected on auth failure.

DKIM Selectors

✗ None detected

No 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

2 records
  • SPFv=spf1 include:spf.protection.outlook.com -all
  • MS=ms63083455
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