rbk-online.de

Valid Email Server
Domain Lookup › rbk-online.de

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
rbk-online.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-03-20 10:06:16 UTC · ↺ Refresh

MX Hostnames

  • mx1.rbk-online.de
  • mail2.rbk-online.de
  • mx2.rbk-online.de

MX Priorities

  • mail2.rbk-online.de: 5
  • mx1.rbk-online.de: 5
  • mx2.rbk-online.de: 20

A / AAAA Records

  • 193.26.15.84 (no PTR)

Mail Server IPs

  • 80.156.174.37 ↩ mail2.rbk-online.de
  • 80.155.160.187 ↩ mx2.rbk-online.de

SOA Record

Raw SOA ns01.ondns.de dns-admin.oevermann.de 2025120102 28800 7200 2419200 3600
Primary NS (mname)
ns01.ondns.de
Admin Email (rname)
dns-admin@oevermann.de
Serial
2025120102
Refresh
28800s
Retry
7200s
Expire
2419200s
Minimum TTL
3600s

Nameservers (NS)

ns01.ondns.de
ns02.ondns.eu

SPF Record

✓ Strict (-all)
v=spf1 mx include:_spf.on.services a:mail10.regioit-aachen.de a:mail11.regioit-aachen.de a:mail12.regioit-aachen.de a:relay11.citkomm.de ip4:62.55.182.68 -all
📊 DNS lookups: 6/10
✓ Hard fail (-all) — strict enforcement

DMARC Record

✓ Reject
v=DMARC1;p=reject;sp=none;adkim=s;aspf=s;rua=mailto:[email protected]
✓ Reject — strongest protection
📋 SPF alignment: Strict · DKIM alignment: Strict
📧 Reports → mailto:[email protected]
↳ Subdomain policy: none

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

7 records
  • apple-domain-verification=TxsxlC1g7dEaACrJ
  • MS=B764CF2DDEF6552889AB6D1FE53EA550F7DD252B
  • uftri3j4g2s962eqic57ek1sm9
  • swisssign-check=7e3Bxoz5f9VjXRrmLuizgbv-UYs
  • swisssign-check=3j0XHqltU7tRgHCPxEqGh8e5tRZxiQozSKkxiCP8C2
  • cisco-ci-domain-verification=768d2d1788695ae34110a0a009835e12f1a997b0e12be156ac81494175e84363
  • SPFv=spf1 mx include:_spf.on.services a:mail10.regioit-aachen.de a:mail11.regioit-aachen.de a:mail12.regioit-aachen.de a:relay11.citkomm.de ip4:62.55.182.68 -all
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