frankfurt-school.de

Valid Email Server
Domain Lookup › frankfurt-school.de

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
frankfurt-school.de
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-03-25 09:49:29 UTC · ↺ Refresh

Add email validation to your forms — free

Add our free script to block 10,000+ disposable domains + perform other checks. No signup, unlimited checks.

MX validation Disposable detection Role accounts
Add to your signup form
<script src="https://check.verifyswift.com/"></script>
One line · No registration · See full docs & demo → · Customize →

MX Hostnames

  • frankfurtschool-de02c.mail.protection.outlook.com

MX Priorities

  • frankfurtschool-de02c.mail.protection.outlook.com: 10

A / AAAA Records

  • 99.84.152.74 ↩ server-99-84-152-74.fra56.r.cloudfront.net
  • 99.84.152.25 ↩ server-99-84-152-25.fra56.r.cloudfront.net
  • 2600:9000:20e8:cc00:1e:57b1:2200:93a1 (no PTR)
  • 2600:9000:20e8:e00:1e:57b1:2200:93a1 (no PTR)

Mail Server IPs

  • 52.101.170.1 ↩ mail-fr4p281cu03101.inbound.protection.outlook.com
  • 52.101.170.2 ↩ mail-fr6p281cu00202.inbound.protection.outlook.com
  • 52.101.168.0 ↩ mail-beup281cu00100.inbound.protection.outlook.com
  • 52.101.170.0 ↩ mail-fr5p281cu00500.inbound.protection.outlook.com

SOA Record

Raw SOA ns6.sec-provider.de hostmaster.sec-provider.de 2026030601 7200 1800 2419200 3600
Primary NS (mname)
ns6.sec-provider.de
Admin Email (rname)
hostmaster@sec-provider.de
Serial
2026030601
Refresh
7200s
Retry
1800s
Expire
2419200s
Minimum TTL
3600s

Nameservers (NS)

ns5.sec-provider.de
ns6.sec-provider.de

SPF Record

✓ Strict (-all)
v=spf1 mx ip4:178.15.47.196 ip4:178.15.47.197 include:spf.protection.outlook.com -all
📊 DNS lookups: 2/10
✓ Hard fail (-all) — strict enforcement

DMARC Record

✗ Missing

No DMARC record — emails cannot be rejected on auth failure.

DKIM Selectors

✗ None detected

No DKIM records found for common selectors — your provider may use a custom selector name.

Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses

All TXT Records

8 records
  • google-site-verification=c7WviiBZMyHq7ydD7jK5IeWNNxf7AKJnGyPJNxgJOEA
  • google-site-verification=j1jfiNF5RncryX4a__3S_TCEeE5iOqL_AGTmKf0F1Bs
  • SPFv=spf1 mx ip4:178.15.47.196 ip4:178.15.47.197 include:spf.protection.outlook.com -all
  • MS=ms55215883
  • 1cxK+CjT69Ks7CcPzmfrRIeWJOTO/q3fjhbFDahAKkV9pCXN9179b/LRnCkhQBntyTt8dmyUiB+XgsLfToBw1Q==
  • apple-domain-verification=HHPqIpmWoR7EZ6C8
  • atlassian-domain-verification=bfqFo/mt7QrpRMD1qh0AaHFKEXrgfs58qE4Si0Ka/aNj1LJxxDzUWFS4QkKbnI8y
  • google-site-verification=l2Zt1lsaGtShW1BxxW0eSjMv9ZgtsyeUncWc83FESX8
Free · No signup required
Add email validation to your forms

Block disposable emails, validate MX records, detect role accounts — unlimited, forever free.

<script src="https://check.verifyswift.com/"></script>
One line of code · Works on any site · Customize →
See demo & docs
Deep verification
Full email verification for frankfurt-school.de

SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.

No credit card required
Get 1,000 Free Credits