Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
rbb-online.de
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-25 01:17:55 UTC · ↺ Refresh
MX Hostnames
- rbbonline-de0i.mail.protection.outlook.com
MX Priorities
- rbbonline-de0i.mail.protection.outlook.com: 0
A / AAAA Records
- 192.108.72.56 ↩ bandcampberlin.de
Mail Server IPs
- 52.101.73.153 ↩ mail-as8pr05cu00401.inbound.protection.outlook.com
- 52.101.73.6 ↩ mail-am6pr04cu00306.inbound.protection.outlook.com
- 52.101.73.11 ↩ mail-am1pr04cu00103.inbound.protection.outlook.com
- 52.101.73.30 ↩ mail-am7pr05cu00306.inbound.protection.outlook.com
- 2a01:111:f403:ca09::4 ↩ mail-am0pr04cu00504.inbound.protection.outlook.com
- 2a01:111:f403:ca04::e ↩ mail-db8pr02cu00106.inbound.protection.outlook.com
- 2a01:111:f403:ca04::c ↩ mail-db9pr02cu00204.inbound.protection.outlook.com
- 2a01:111:f403:ca04::10 ↩ mail-dbapr03cu00100.inbound.protection.outlook.com
SOA Record
Raw SOA
ns1.vodafone-ip.de admin.rbb-online.de 2026032230 10800 3600 3600000 86400
Primary NS (mname)
ns1.vodafone-ip.de
Admin Email (rname)
admin@rbb-online.de
Serial
2026032230
Refresh
10800s
Retry
3600s
Expire
3600000s
Minimum TTL
86400s
Nameservers (NS)
ns2.vodafone-ip.de
auth1.dns.cogentco.com
auth2.dns.cogentco.com
ns1.vodafone-ip.de
SPF Record
✓ Strict (-all)
v=spf1 ip4:192.108.72.8 ip4:192.108.72.208 ip4:185.17.245.28 ip4:185.17.245.132 include:spf.protection.outlook.com include:spf.umantis.com include:spf.de.umantis.com include:spf.mailjet.com include:spf.lamapoll.de include:_pui.sr.de -all
📊 DNS lookups: 6/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject; pct=100; rua=mailto:[email protected],mailto:[email protected]; ruf=mailto:[email protected]; fo=1;
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected],mailto:[email protected]
DKIM Selectors
✓ 2 found
selector1._domainkey
selector2._domainkey
✓ Public key: 216 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
7 records- HARICA-yZ82MdL2SMMCY25lBtv
- HARICA-pMrBt8g5dHmyTJBCXfg
- apple-domain-verification=GPM5yFPc4Y1eI4Gp
- Yrq3sW++HMoHo1sFB3J+euphdiJgONdaLsP2YCD6S3XD4ldSF90KO0gzQIDISRB0nsSBjLELpc9EY2q6E3ooTQ==
- MS=ms26514738
- SPFv=spf1 ip4:192.108.72.8 ip4:192.108.72.208 ip4:185.17.245.28 ip4:185.17.245.132 include:spf.protection.outlook.com include:spf.umantis.com include:spf.de.umantis.com include:spf.mailjet.com include:spf.lamapoll.de include:_pui.sr.de -all
- adobe-idp-site-verification=eccab354-0fd0-47ea-a61f-2e2b881dbbe0
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