Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
rsa.de
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-30 15:02:47 UTC · ↺ Refresh
MX Hostnames
- rsa-de.mail.protection.outlook.com
MX Priorities
- rsa-de.mail.protection.outlook.com: 0
A / AAAA Records
- 188.94.254.99 (no PTR)
Mail Server IPs
- 52.101.68.25 ↩ mail-db8pr02cu00101.inbound.protection.outlook.com
- 52.101.73.6 ↩ mail-am6pr04cu00306.inbound.protection.outlook.com
- 52.101.68.21 ↩ mail-db4pr02cu00205.inbound.protection.outlook.com
- 52.101.73.26 ↩ mail-as9pr05cu01302.inbound.protection.outlook.com
- 2a01:111:f403:ca09::9 ↩ mail-as8pr04cu00801.inbound.protection.outlook.com
- 2a01:111:f403:ca09::d ↩ mail-as9pr05cu01305.inbound.protection.outlook.com
- 2a01:111:f403:ca04::1 ↩ mail-db7pr03cu00401.inbound.protection.outlook.com
- 2a01:111:f403:ca04:: ↩ mail-db3pr0202cu00100.inbound.protection.outlook.com
SOA Record
Raw SOA
ns1077.ui-dns.org hostmaster.kundenserver.de 2016110605 28800 7200 604800 300
Primary NS (mname)
ns1077.ui-dns.org
Admin Email (rname)
hostmaster@kundenserver.de
Serial
2016110605
Refresh
28800s
Retry
7200s
Expire
604800s
Minimum TTL
300s
Nameservers (NS)
ns1077.ui-dns.org
ns1077.ui-dns.biz
ns1077.ui-dns.com
ns1077.ui-dns.de
SPF Record
✓ Strict (-all)
v=spf1 include:spf.protection.outlook.com ip4:91.136.133.210 include:spf.emailsignatures365.com ip4:213.95.207.141 -all
📊 DNS lookups: 2/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine; pct=100; rua=mailto:[email protected]; ruf=mailto:[email protected]; fo=1; adkim=s; aspf=s
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Strict
· DKIM alignment: Strict
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 4 found
selector1._domainkey
selector2._domainkey
s1._domainkey
s2._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
3 records- SPFv=spf1 include:spf.protection.outlook.com ip4:91.136.133.210 include:spf.emailsignatures365.com ip4:213.95.207.141 -all
- MS=27296EF5E2585DFD47789FA06622BB0AD6BF405F
- Iz46NmudkP7UMWj/LWrBD0Nc8fzczlHsWtyF+SVEVvlESL192XOldAJTmPKuUetDiYod9zhAdZR2NQ+5XT9LwA==
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