Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
net.t-labs.tu-berlin.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-31 17:13:06 UTC · ↺ Refresh
MX Hostnames
- b1861.mx.srv.dfn.de
- a1861.mx.srv.dfn.de
- mail1.inet.tu-berlin.de
- c1861.mx.srv.dfn.de
MX Priorities
- a1861.mx.srv.dfn.de: 10
- b1861.mx.srv.dfn.de: 10
- c1861.mx.srv.dfn.de: 10
- mail1.inet.tu-berlin.de: 20
A / AAAA Records
- 130.149.220.242 ↩ mail.inet.tu-berlin.de
Mail Server IPs
- 194.95.232.130 ↩ a1861.mx.srv.dfn.de
- 194.95.234.130 ↩ b1861.mx.srv.dfn.de
- 194.95.238.130 ↩ c1861.mx.srv.dfn.de
- 130.149.220.242 ↩ mail.inet.tu-berlin.de
SOA Record
Raw SOA
dns.inet.tu-berlin.de hostmaster.inet.tu-berlin.de 2024082054 28800 14400 2419200 86400
Primary NS (mname)
dns.inet.tu-berlin.de
Admin Email (rname)
hostmaster@inet.tu-berlin.de
Serial
2024082054
Refresh
28800s
Retry
14400s
Expire
2419200s
Minimum TTL
86400s
Nameservers (NS)
dns.inet.tu-berlin.de
dns2.inet.tu-berlin.de
dns3.inet.tu-berlin.de
SPF Record
✓ Soft Fail (~all)
v=spf1 ip4:130.149.220.252 ip4:130.149.220.242 ip4:130.149.152.141 ip4:130.149.7.33 ip6:2001:638:809:ff11:130:149:220:252 ip6:2001:638:809:ff11:130:149:220:7 ip6:2001:638:809:ff20:130:149:152:141 ~all
📊 DNS lookups: 0/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine; rua=mailto:[email protected]; ruf=mailto:[email protected]; sp=quarantine; fo=1; ri=3600
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
↳ Subdomain policy: quarantine
DKIM Selectors
✓ 1 found
mail._domainkey
✓ Public key: 392 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
1 record- SPFv=spf1 ip4:130.149.220.252 ip4:130.149.220.242 ip4:130.149.152.141 ip4:130.149.7.33 ip6:2001:638:809:ff11:130:149:220:252 ip6:2001:638:809:ff11:130:149:220:7 ip6:2001:638:809:ff20:130:149:152:141 ~all
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