Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
isarklinikum.de
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-29 21:47:13 UTC · ↺ Refresh
MX Hostnames
- isarklinikum-de.mail.protection.outlook.com
MX Priorities
- isarklinikum-de.mail.protection.outlook.com: 0
A / AAAA Records
- 104.20.46.149 (no PTR)
- 172.66.146.112 (no PTR)
- 2606:4700:10::6814:2e95
- 2606:4700:10::ac42:9270
Mail Server IPs
- 52.101.170.1 ↩ mail-fr4p281cu03101.inbound.protection.outlook.com
- 52.101.170.2 ↩ mail-fr6p281cu00202.inbound.protection.outlook.com
- 52.101.170.0 ↩ mail-fr5p281cu00500.inbound.protection.outlook.com
- 52.101.168.0 ↩ mail-beup281cu00100.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:: ↩ mail-fr5p281cu00500.inbound.protection.outlook.com
- 2a01:111:f403:ca2d::2 ↩ mail-fr6p281cu00202.inbound.protection.outlook.com
SOA Record
Raw SOA
ali.ns.cloudflare.com dns.cloudflare.com 2399287472 10000 2400 604800 1800
Primary NS (mname)
ali.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2399287472
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s
Nameservers (NS)
jay.ns.cloudflare.com
ali.ns.cloudflare.com
SPF Record
✓ Soft Fail (~all)
v=spf1 a:mx01.rexx-systems.de ip4:82.135.115.210 include:spf.protection.outlook.com include:_spf.zimpel.de ~all
📊 DNS lookups: 3/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject; adkim=s; aspf=s; rua=mailto:[email protected]
✓ Reject — strongest protection
📋 SPF alignment: Strict
· DKIM alignment: Strict
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 3 found
selector1._domainkey
selector2._domainkey
default._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
6 records- brevo-code:589219acc8108a164e2e7c8c3657b19c
- duo_sso_verification=wlMnRm8vTRreoy28kmSeWsmFS4ISTbx41HZHiwsJmMFsVRofjfoXngUPXTQOXf7j
- google-site-verification=Frg3E9q0nfplvHXGFF0mdF8G7BdIsatZTPmemhesNyM
- swisssign-check=rUtcpkfiYYEkwG44r-g17LCaR1c
- swisssign-check=xI1WElyWOT21A6MBbEuB3NmdvUg
- SPFv=spf1 a:mx01.rexx-systems.de ip4:82.135.115.210 include:spf.protection.outlook.com include:_spf.zimpel.de ~all
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