Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
trv-krefeld.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-29 11:29:26 UTC · ↺ Refresh
MX Hostnames
- smtp-01.tld.t-online.de
- smtp-02.tld.t-online.de
MX Priorities
- smtp-02.tld.t-online.de: 10
- smtp-01.tld.t-online.de: 10
A / AAAA Records
- 82.165.146.237 ↩ s21017314.onlinehome-server.info
Mail Server IPs
- 194.25.134.12 ↩ smtp-02.tld.t-online.de
- 194.25.134.76 ↩ smtp-01.tld.t-online.de
SOA Record
Raw SOA
dns01-tld.t-online.de dns.telekom.de 2024102601 21600 3600 604800 86400
Primary NS (mname)
dns01-tld.t-online.de
Admin Email (rname)
dns@telekom.de
Serial
2024102601
Refresh
21600s
Retry
3600s
Expire
604800s
Minimum TTL
86400s
Nameservers (NS)
dns01-tld.t-online.de
dns02-tld.t-online.de
SPF Record
✓ Soft Fail (~all)
v=spf1 a mx a:cckr.trv-krefeld.de ip4:78.94.180.10 ~all
📊 DNS lookups: 3/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
✗ MissingNo DMARC record — emails cannot be rejected on auth failure.
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 a mx a:cckr.trv-krefeld.de ip4:78.94.180.10 ~all
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