Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
rbb-media.de
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-20 23:24:05 UTC · ↺ Refresh
MX Hostnames
- rbbmedia-de0i.mail.protection.outlook.com
MX Priorities
- rbbmedia-de0i.mail.protection.outlook.com: 0
A / AAAA Records
- 185.88.215.91 ↩ srv-a-io.c-1364.maxcluster.net
- 2a00:f48:1008::215:91:10 ↩ srv-a-io.c-1364.maxcluster.net
Mail Server IPs
- 52.101.170.1 ↩ mail-fr4p281cu03101.inbound.protection.outlook.com
- 52.101.168.0 ↩ mail-beup281cu00100.inbound.protection.outlook.com
- 52.101.170.0 ↩ mail-fr5p281cu00500.inbound.protection.outlook.com
- 52.101.170.2 ↩ mail-fr6p281cu00202.inbound.protection.outlook.com
- 2a01:111:f403:ca27:: ↩ mail-beup281cu00100.inbound.protection.outlook.com
- 2a01:111:f403:ca2d::1 ↩ mail-fr4p281cu03101.inbound.protection.outlook.com
- 2a01:111:f403:ca2d::2 ↩ mail-fr6p281cu00202.inbound.protection.outlook.com
- 2a01:111:f403:ca2d:: ↩ mail-fr5p281cu00500.inbound.protection.outlook.com
SOA Record
Raw SOA
nameserver-1-io.maxcluster.net info.maxcluster.net 2026031302 3600 1000 1209600 600
Primary NS (mname)
nameserver-1-io.maxcluster.net
Admin Email (rname)
info@maxcluster.net
Serial
2026031302
Refresh
3600s
Retry
1000s
Expire
1209600s
Minimum TTL
600s
Nameservers (NS)
nameserver-2-io.maxcluster.net
nameserver-1-io.maxcluster.net
SPF Record
✓ Strict (-all)
v=spf1 ip4:193.104.174.217 ip4:192.108.72.0/24 ip4:193.104.174.218 include:spf.protection.outlook.com include:spf.emailsignatures365.com include:mail-io.maxcluster.net -all
📊 DNS lookups: 3/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine; rua=mailto:[email protected]; fo=0; pct=100; ri=86400
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
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
4 records- /lOtsOi3Ukzwtm7JnksjtMvCyGXNPtZS+2mY4U2aaE0ih0aXTa3luM3x/KnFmTYE1BdlX1ljxSXqhrfmBOpNAQ==
- MS=ms23438523
- SPFv=spf1 ip4:193.104.174.217 ip4:192.108.72.0/24 ip4:193.104.174.218 include:spf.protection.outlook.com include:spf.emailsignatures365.com include:mail-io.maxcluster.net -all
- linkedin-site-verification=7ec1327a-cb11-4e77-a7de-032e4b466cb2
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