Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
tu-bs.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-31 10:48:01 UTC · ↺ Refresh
MX Hostnames
- a1991.mx.srv.dfn.de
- c1991.mx.srv.dfn.de
- b1991.mx.srv.dfn.de
MX Priorities
- b1991.mx.srv.dfn.de: 10
- c1991.mx.srv.dfn.de: 10
- a1991.mx.srv.dfn.de: 10
A / AAAA Records
- 134.169.9.1 ↩ tu-bs.de
- 2001:638:602:f004::2 ↩ tu-bs.de
Mail Server IPs
- 194.95.234.151 ↩ b1991.mx.srv.dfn.de
- 194.95.238.151 ↩ c1991.mx.srv.dfn.de
- 194.95.232.151 ↩ a1991.mx.srv.dfn.de
SOA Record
Raw SOA
rzdnsprime.rz.tu-bs.de noc.tu-bs.de 706290748 21600 3600 1814400 10800
Primary NS (mname)
rzdnsprime.rz.tu-bs.de
Admin Email (rname)
noc@tu-bs.de
Serial
706290748
Refresh
21600s
Retry
3600s
Expire
1814400s
Minimum TTL
10800s
Nameservers (NS)
rzdnssecond.rz.tu-bs.de
deneb.dfn.de
rzdnsprime.rz.tu-bs.de
SPF Record
✓ Soft Fail (~all)
v=spf1 ip4:134.169.4.128/26 ~all
📊 DNS lookups: 0/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
✗ p=none
v=DMARC1;p=none;pct=100;rua=mailto:[email protected];ruf=mailto:[email protected];adkim=r;aspf=r
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 1 found
mail._domainkey
✓ Public key: 216 chars (valid)
✓ DKIM properly configured for selector: mail
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
6 records- _telesec-domain-validation=336084_2025-05-09_srxBSiyhpe4ihOqOUMtHMIwONlLhBcJO5CB24HCqK4gTRggy5G
- cisco-ci-domain-verification=63a4857df37f990f6ee5e62ae44de0ffe10e34eddded04543a245cdc3c76a9e5
- SPFv=spf1 ip4:134.169.4.128/26 ~all
- 83fbd8eee9d9f02cc07478e05151bae1
- MS=ms41660813
- adobe-idp-site-verification=a03944d1f2ea68afe93f653b6e9621cd261ba07ea8cdeb5376757864cd72f553
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