usu.de

Valid Email Server
Domain Lookup › usu.de

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
usu.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Did you mean: [email protected]

Checked via [email protected] · 2026-03-21 11:11:12 UTC · ↺ Refresh

MX Hostnames

  • mail.usu.com

MX Priorities

  • mail.usu.com: 10

A / AAAA Records

  • 199.60.103.57 (no PTR)
  • 199.60.103.157 (no PTR)

Mail Server IPs

  • 88.198.238.220 ↩ cc220.cc-networkx.net

SOA Record

Raw SOA ns.inwx.de hostmaster.inwx.de 2025111301 10800 3600 604800 3600
Primary NS (mname)
ns.inwx.de
Admin Email (rname)
hostmaster@inwx.de
Serial
2025111301
Refresh
10800s
Retry
3600s
Expire
604800s
Minimum TTL
3600s

Nameservers (NS)

ns3.inwx.eu
ns.inwx.de
ns2.inwx.de

SPF Record

✓ Strict (-all)
v=spf1 a mx ip4:89.37.143.166 ip4:80.190.129.128/25 ip4:88.198.238.220 ip4:88.198.238.221 include:spf.protection.outlook.com -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]
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed · DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]

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

5 records
  • ewpt2l4aKfswrOPk7RN2gpttd//C0yM/tlUvcDL5/xAYTl1hgVVmamRidQF2oH3KIvhKWLMzeqb8Mc9uAWHIAg==
  • SPFv=spf1 a mx ip4:89.37.143.166 ip4:80.190.129.128/25 ip4:88.198.238.220 ip4:88.198.238.221 include:spf.protection.outlook.com -all
  • USU Software AG
  • MS=ms19299047
  • unLzp8TB0MJFQ6Std4udqFpfNmRBduH0F9xFTWD0P1wM4sEzneYoKOywdJi9/ElNkL8/IVqaG74HQx6Z9pQfeA==
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