Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
pem.rwth-aachen.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-27 15:16:23 UTC · ↺ Refresh
MX Hostnames
- mx1.rz.rwth-aachen.de
MX Priorities
- mx1.rz.rwth-aachen.de: 1330
A / AAAA Records
No A/AAAA records found.
Mail Server IPs
- 137.226.78.57 ↩ mx1.rz.rwth-aachen.de
SOA Record
Raw SOA
zs1.rz.rwth-aachen.de hostmaster.rwth-aachen.de 2026032502 10800 3600 3600000 600
Primary NS (mname)
zs1.rz.rwth-aachen.de
Admin Email (rname)
hostmaster@rwth-aachen.de
Serial
2026032502
Refresh
10800s
Retry
3600s
Expire
3600000s
Minimum TTL
600s
Nameservers (NS)
dns-1.dfn.de
dns-2.dfn.de
zs1.rz.rwth-aachen.de
zs2.rz.rwth-aachen.de
SPF Record
✓ Strict (-all)
v=spf1 include:_spf.itc.rwth-aachen.de -all
📊 DNS lookups: 1/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject; rua=mailto:[email protected]; ruf=mailto:[email protected];
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✗ None detectedNo 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
1 record- SPFv=spf1 include:_spf.itc.rwth-aachen.de -all
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