Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
apollon-hochschule.de
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-30 14:38:10 UTC · ↺ Refresh
MX Hostnames
- apollonhochschule-de01i.mail.protection.outlook.com
MX Priorities
- apollonhochschule-de01i.mail.protection.outlook.com: 0
A / AAAA Records
- 185.225.134.140 ↩ apollon-hochschule.de
Mail Server IPs
- 52.101.68.15 ↩ mail-db6pr03cu00107.inbound.protection.outlook.com
- 52.101.73.8 ↩ mail-am0pr04cu00500.inbound.protection.outlook.com
- 52.101.68.18 ↩ mail-db4pr02cu00302.inbound.protection.outlook.com
- 52.101.73.15 ↩ mail-am9pr04cu00107.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
- 2a01:111:f403:ca04::4 ↩ mail-db4pr02cu00204.inbound.protection.outlook.com
- 2a01:111:f403:ca09::6 ↩ mail-am4pr0401cu00106.inbound.protection.outlook.com
SOA Record
Raw SOA
ns1.routing.net hostmaster.apollon-hochschule.de 2026030300 28800 7200 604800 900
Primary NS (mname)
ns1.routing.net
Admin Email (rname)
hostmaster@apollon-hochschule.de
Serial
2026030300
Refresh
28800s
Retry
7200s
Expire
604800s
Minimum TTL
900s
Nameservers (NS)
ns1.routing.net
ns2.routing.net
ns3.routing.net
SPF Record
✓ Strict (-all)
v=spf1 ip4:116.203.110.13 ip4:159.69.3.23 ip4:82.198.213.121 ip4:85.215.5.68 ip4:185.225.134.140 include:spf.protection.outlook.com include:_spf.zimpel.de include:spf.hornetsecurity.com -all
📊 DNS lookups: 3/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine; rua=mailto:[email protected],mailto:[email protected]; ruf=mailto:[email protected]; fo=1;
~ Quarantine — good protection (failing mail goes to spam)
📋 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- apple-domain-verification=A7JT0GFQwQHidaGe
- amazon-business-verification=a9ebc461b5d3e10ac6fa796997212a671912749a96b41ba9e28da728b691cc55
- atlassian-domain-verification=lDznyBEuEcaru31sClAgR9geD6f9x3gDXfyY/laJQprdJuzM1AGZnXPhI34Pqkcn
- atlassian-sending-domain-verification=cc77f7a8-60e5-4e9e-938f-2deebc354b69
- SPFv=spf1 ip4:116.203.110.13 ip4:159.69.3.23 ip4:82.198.213.121 ip4:85.215.5.68 ip4:185.225.134.140 include:spf.protection.outlook.com include:_spf.zimpel.de include:spf.hornetsecurity.com -all
- MS=ms76492002
- linkedin-site-verification=23f872d5-fd67-469f-8811-955563c5d9a7
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