rs-system.de

Valid Email Server
Domain Lookup › rs-system.de

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
rs-system.de
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-04-02 02:48:47 UTC · ↺ Refresh

MX Hostnames

  • rssystem-de0e.mail.protection.outlook.com

MX Priorities

  • rssystem-de0e.mail.protection.outlook.com: 10

A / AAAA Records

  • 194.25.236.91 (no PTR)

Mail Server IPs

  • 52.101.68.0 ↩ mail-db3pr0202cu00100.inbound.protection.outlook.com
  • 52.101.73.2 ↩ mail-as9pr07cu00302.inbound.protection.outlook.com
  • 52.101.68.32 ↩ mail-db3pr0202cu00200.inbound.protection.outlook.com
  • 52.101.73.16 ↩ mail-as2pr05cu00100.inbound.protection.outlook.com
  • 2a01:111:f403:ca04::7 ↩ mail-db4pr02cu00307.inbound.protection.outlook.com
  • 2a01:111:f403:ca04::10 ↩ mail-dbapr03cu00100.inbound.protection.outlook.com
  • 2a01:111:f403:ca09::b ↩ mail-am7pr05cu00103.inbound.protection.outlook.com
  • 2a01:111:f403:ca09::f ↩ mail-am7pr05cu00307.inbound.protection.outlook.com

SOA Record

Raw SOA nsa3.schlundtech.de ralf\.stegmann.stegmannsystems.com 2023090500 43200 7200 1209600 600
Primary NS (mname)
nsa3.schlundtech.de
Admin Email (rname)
ralf\@stegmann.stegmannsystems.com
Serial
2023090500
Refresh
43200s
Retry
7200s
Expire
1209600s
Minimum TTL
600s

Nameservers (NS)

nsd3.schlundtech.de
nsb3.schlundtech.de
nsc3.schlundtech.de
nsa3.schlundtech.de

SPF Record

✓ Strict (-all)
v=spf1 ip4:62.157.143.58 ip4:80.148.16.18 include:spf.protection.outlook.com include:spf.emailsignatures365.com -all
📊 DNS lookups: 2/10
✓ 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
  • MS=ms72616354
  • SPFv=spf1 ip4:62.157.143.58 ip4:80.148.16.18 include:spf.protection.outlook.com include:spf.emailsignatures365.com -all
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