Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
ulmkolleg.de
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-04-03 09:00:36 UTC · ↺ Refresh
MX Hostnames
- ulmkolleg-de.mail.protection.outlook.com
MX Priorities
- ulmkolleg-de.mail.protection.outlook.com: 10
A / AAAA Records
- 217.160.0.221 ↩ 217-160-0-221.elastic-ssl.ui-r.com
Mail Server IPs
- 52.101.68.0 ↩ mail-db3pr0202cu00100.inbound.protection.outlook.com
- 52.101.68.5 ↩ mail-du2pr03cu00105.inbound.protection.outlook.com
- 52.101.73.11 ↩ mail-am1pr04cu00103.inbound.protection.outlook.com
- 52.101.73.22 ↩ mail-am7pr05cu00106.inbound.protection.outlook.com
- 2a01:111:f403:ca09::3 ↩ mail-am6pr04cu00303.inbound.protection.outlook.com
- 2a01:111:f403:ca09::1 ↩ mail-as9pr07cu00301.inbound.protection.outlook.com
- 2a01:111:f403:ca04::f ↩ mail-db7pr03cu00507.inbound.protection.outlook.com
- 2a01:111:f403:ca04::c ↩ mail-db9pr02cu00204.inbound.protection.outlook.com
SOA Record
Raw SOA
shades06.rzone.de hostmaster.strato-rz.de 2023011226 86400 7200 604800 300
Primary NS (mname)
shades06.rzone.de
Admin Email (rname)
hostmaster@strato-rz.de
Serial
2023011226
Refresh
86400s
Retry
7200s
Expire
604800s
Minimum TTL
300s
Nameservers (NS)
shades06.rzone.de
docks18.rzone.de
SPF Record
✓ Strict (-all)
v=spf1 include:spf.protection.outlook.com include:spf.sendinblue.com -all
📊 DNS lookups: 2/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine; aspf=r; rua=mailto:[email protected]
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 3 found
selector1._domainkey
selector2._domainkey
mail._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
4 records- google-site-verification=0rebUij5QHqzMNF34zzzVEajhQLZRTAc6hBnAptNdOE
- SPFv=spf1 include:spf.protection.outlook.com include:spf.sendinblue.com -all
- brevo-code:93a53d205e3e0623cc6c2f245b61570c
- zone-ownership-verification-e5a39f3842dd8e4a49605b1a68a5f5301b30299dffa6d942732b2b8b29aa4332
Full email verification for ulmkolleg.de
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