Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
tum.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-17 20:59:08 UTC · ↺ Refresh
MX Hostnames
- postrelay2.lrz.de
- postrelay1.lrz.de
MX Priorities
- postrelay2.lrz.de: 100
- postrelay1.lrz.de: 100
A / AAAA Records
- 129.187.255.109 ↩ tu-muenchen.de
- 2001:4ca0::103:0:0:81bb:ff6d ↩ wwwv21.tum.de
Mail Server IPs
- 129.187.254.159 ↩ postrelay2a.lrz.de
- 129.187.255.161 ↩ postrelay2b.lrz.de
- 2001:4ca0::103:0:25:1:2 ↩ postrelay2a.lrz.de
- 2001:4ca0::103:0:0:81bb:ffa1 ↩ postrelay2b.lrz.de
- 129.187.254.158 ↩ postrelay1a.lrz.de
- 129.187.255.160 ↩ postrelay1b.lrz.de
- 2001:4ca0::103:0:25:1:1 ↩ postrelay1a.lrz.de
- 2001:4ca0::103:0:0:81bb:ffa0 ↩ postrelay1.lrz.de
SOA Record
Raw SOA
dns1.lrz.de hostmaster.lrz.de 2026031618 21600 1800 3600000 86400
Primary NS (mname)
dns1.lrz.de
Admin Email (rname)
hostmaster@lrz.de
Serial
2026031618
Refresh
21600s
Retry
1800s
Expire
3600000s
Minimum TTL
86400s
Nameservers (NS)
dns1.lrz.de
dns3.lrz.eu
dns2.lrz.bayern
SPF Record
✓ Soft Fail (~all)
v=spf1 a:mail.zv.tum.de a:mail.ze.tum.de redirect=_spf.mail.lrz.de
📊 DNS lookups: 3/10
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine; rua=mailto:[email protected]
~ Quarantine — good protection (failing mail goes to spam)
📋 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
3 records- bw=UGjzuUOdXCI3ug1kQ2emVoj5D5yYnZDCS72jBNyGexs1
- SPFv=spf1 a:mail.zv.tum.de a:mail.ze.tum.de redirect=_spf.mail.lrz.de
- Foxit-domain-verification=116f60d9e8a810fb28cac4580850729f
Full email verification for tum.de
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