grebau.de

Valid Email Server
Domain Lookup › grebau.de

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
grebau.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Did you mean: [email protected]

Checked via [email protected] · 2026-03-18 03:59:33 UTC · ↺ Refresh

MX Hostnames

  • mx2.onoffice.de
  • mx1.onoffice.de

MX Priorities

  • mx1.onoffice.de: 10
  • mx2.onoffice.de: 20

A / AAAA Records

  • 46.30.58.192 ↩ r1040.agenturserver.it

Mail Server IPs

  • 95.130.253.60 ↩ mx1.onoffice.de
  • 95.130.253.71 ↩ mx2.onoffice.de

SOA Record

Raw SOA ns81.domaincontrol.com dns.jomax.net 2025093002 28800 7200 604800 600
Primary NS (mname)
ns81.domaincontrol.com
Admin Email (rname)
dns@jomax.net
Serial
2025093002
Refresh
28800s
Retry
7200s
Expire
604800s
Minimum TTL
600s

Nameservers (NS)

ns82.domaincontrol.com
ns81.domaincontrol.com

SPF Record

✓ Strict (-all)
v=spf1 a include:_spf.onoffice.de include:agenturserver.de -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

✗ 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

1 record
  • SPFv=spf1 a include:_spf.onoffice.de include:agenturserver.de -all
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