Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
mtu.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-26 03:09:52 UTC · ↺ Refresh
MX Hostnames
- mx2-63.mtu.de
- mx1-63.mtu.de
- mx0-61.mtu.de
MX Priorities
- mx2-63.mtu.de: 10
- mx0-61.mtu.de: 10
- mx1-63.mtu.de: 10
A / AAAA Records
- 3.33.173.236 ↩ aa35e48bc3b971b10.awsglobalaccelerator.com
- 15.197.179.195 ↩ aa35e48bc3b971b10.awsglobalaccelerator.com
Mail Server IPs
- 91.217.214.186 ↩ mx2-63.mtu.de
- 91.217.214.168 ↩ mx0-61.mtu.de
- 91.217.214.169 ↩ mx1-63.mtu.de
SOA Record
Raw SOA
a.ns14.net hostmaster.mtu.de 2026010810 43200 7200 1209600 600
Primary NS (mname)
a.ns14.net
Admin Email (rname)
hostmaster@mtu.de
Serial
2026010810
Refresh
43200s
Retry
7200s
Expire
1209600s
Minimum TTL
600s
Nameservers (NS)
c.ns14.net
d.ns14.net
a.ns14.net
b.ns14.net
SPF Record
✓ Strict (-all)
v=spf1 a:mx2-63.mtu.de a:mx0-61.mtu.de a:mx1-63.mtu.de -all
📊 DNS lookups: 3/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✗ p=none
v=DMARC1; p=none; rua=mailto:[email protected]; ruf=mailto:[email protected]; pct=100; adkim=r; aspf=r; fo=1
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 1 found
default._domainkey
✓ Public key: 392 chars (valid)
✓ DKIM properly configured for selector: default
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
6 records- smartsheet-site-validation=ULvoGhxNRQreawZt2aQsGnHVnRuohTBZ
- ZOOM_verify_74om2qO1RyGPwiaAOXuHuw
- dell-technologies-domain-verification=mtu.de_2e550163-3439-438b-8135-846d5e50702b_1726637836
- MS=ms97733255
- SPFv=spf1 a:mx2-63.mtu.de a:mx0-61.mtu.de a:mx1-63.mtu.de -all
- 1Pb/KqjZTwtQaRMkbakkChw6KRQ1E/we3Slm0F1cf/pnzfnkjib3tEXa0kOkVK1Uq87/mXkKo+6MY4zpSV1nUQ==
Full email verification for mtu.de
Run SMTP check, SPF/DKIM/DMARC and catch-all detection.
SPF / DKIM / DMARC Get 1,000 Free Credits