osterfelder.de

Valid Email Server
Domain Lookup › osterfelder.de

Domain Overview

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

Checked via [email protected] · 2026-03-25 01:40:08 UTC · ↺ Refresh

MX Hostnames

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

MX Priorities

  • osterfelder-de.mail.protection.outlook.com: 0

A / AAAA Records

  • 159.255.168.126 (no PTR)

Mail Server IPs

  • 52.101.168.0 ↩ mail-beup281cu00100.inbound.protection.outlook.com
  • 52.101.170.2 ↩ mail-fr6p281cu00202.inbound.protection.outlook.com
  • 52.101.170.0 ↩ mail-fr5p281cu00500.inbound.protection.outlook.com
  • 52.101.170.1 ↩ mail-fr4p281cu03101.inbound.protection.outlook.com
  • 2a01:111:f403:ca2d::1 ↩ mail-fr4p281cu03101.inbound.protection.outlook.com
  • 2a01:111:f403:ca2d:: ↩ mail-fr5p281cu00500.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 ns1.x-dot.de postmaster.osterfelder.de 2019022601 10800 3600 1209600 86400
Primary NS (mname)
ns1.x-dot.de
Admin Email (rname)
postmaster@osterfelder.de
Serial
2019022601
Refresh
10800s
Retry
3600s
Expire
1209600s
Minimum TTL
86400s

Nameservers (NS)

ns2.x-dot.de
ns1.x-dot.de
ns3.xdot.de

SPF Record

✓ Strict (-all)
v=spf1 mx ip4:62.214.5.98 ip4:217.78.140.34 ip4:159.255.168.143 ip4:213.133.106.45 ip6:2a01:4f8:d0a:20ac::2 include:spf.protection.outlook.com include:_spf.aareon.com -all
📊 DNS lookups: 3/10
✓ Hard fail (-all) — strict enforcement

DMARC Record

✗ Missing

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

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

2 records
  • SPFv=spf1 mx ip4:62.214.5.98 ip4:217.78.140.34 ip4:159.255.168.143 ip4:213.133.106.45 ip6:2a01:4f8:d0a:20ac::2 include:spf.protection.outlook.com include:_spf.aareon.com -all
  • MS=ms65983072
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