rub-gmbh.de

Valid Email Server
Domain Lookup › rub-gmbh.de

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
rub-gmbh.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-03-24 20:57:00 UTC · ↺ Refresh

MX Hostnames

  • rub-gmbh-de.mail.cloud.nospamproxy.com

MX Priorities

  • rub-gmbh-de.mail.cloud.nospamproxy.com: 0

A / AAAA Records

  • 216.198.79.1 (no PTR)

Mail Server IPs

  • 178.212.92.204 ↩ de-s02-gw2.mail.cloud.nospamproxy.com
  • 193.37.132.36 ↩ de-s02-gw1.mail.cloud.nospamproxy.com

SOA Record

Raw SOA ns1083.ui-dns.com hostmaster.1und1.de 2016090229 28800 7200 604800 300
Primary NS (mname)
ns1083.ui-dns.com
Admin Email (rname)
hostmaster@1und1.de
Serial
2016090229
Refresh
28800s
Retry
7200s
Expire
604800s
Minimum TTL
300s

Nameservers (NS)

ns1083.ui-dns.org
ns1083.ui-dns.de
ns1083.ui-dns.com
ns1083.ui-dns.biz

SPF Record

✓ Strict (-all)
v=spf1 include:spf.protection.outlook.com include:spf.rub-gmbh-de.cloud.nospamproxy.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

3 records
  • v=verifydomain MS=7365820
  • SPFv=spf1 include:spf.protection.outlook.com include:spf.rub-gmbh-de.cloud.nospamproxy.com -all
  • xdyeCux7HnkDufkgeJlhkYgHBLqhb5LdSbcWidieREw=
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