simonsengmbh.de

Valid Email Server
Domain Lookup › simonsengmbh.de

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
simonsengmbh.de
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-03-27 10:10:31 UTC · ↺ Refresh

MX Hostnames

  • simonsengmbh-de.mail.protection.outlook.com

MX Priorities

  • simonsengmbh-de.mail.protection.outlook.com: 10

A / AAAA Records

  • 213.238.37.212 ↩ cl2.isp-netzplan.de

Mail Server IPs

  • 52.101.170.0 ↩ mail-fr5p281cu00500.inbound.protection.outlook.com
  • 52.101.168.0 ↩ mail-beup281cu00100.inbound.protection.outlook.com
  • 52.101.170.2 ↩ mail-fr6p281cu00202.inbound.protection.outlook.com
  • 52.101.170.1 ↩ mail-fr4p281cu03101.inbound.protection.outlook.com
  • 2a01:111:f403:ca2d:: ↩ mail-fr5p281cu00500.inbound.protection.outlook.com
  • 2a01:111:f403:ca2d::1 ↩ mail-fr4p281cu03101.inbound.protection.outlook.com
  • 2a01:111:f403:ca2d::2 ↩ mail-fr6p281cu00202.inbound.protection.outlook.com
  • 2a01:111:f403:ca27:: ↩ mail-beup281cu00100.inbound.protection.outlook.com

SOA Record

Raw SOA cl2.isp-netzplan.de hosting.netzplan.de 2025041701 10800 3600 604800 10800
Primary NS (mname)
cl2.isp-netzplan.de
Admin Email (rname)
hosting@netzplan.de
Serial
2025041701
Refresh
10800s
Retry
3600s
Expire
604800s
Minimum TTL
10800s

Nameservers (NS)

cl2.isp-netzplan.de
ns3.isp-netzplan.de

SPF Record

✓ Strict (-all)
v=spf1 mx a a:mrelay.isp-netzplan.de ip4:85.16.75.171 ip4:80.151.149.56 ip4:80.149.94.10 include:spf.protection.outlook.com -all
📊 DNS lookups: 4/10
✓ Hard fail (-all) — strict enforcement

DMARC Record

✗ Missing

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

DKIM Selectors

✓ 3 found
selector1._domainkey
selector2._domainkey
default._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

2 records
  • SPFv=spf1 mx a a:mrelay.isp-netzplan.de ip4:85.16.75.171 ip4:80.151.149.56 ip4:80.149.94.10 include:spf.protection.outlook.com -all
  • MS=ms67683169
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