Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
rtw-bremen.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-19 21:30:18 UTC · ↺ Refresh
MX Hostnames
- mx.rtw-bremen.de
- mail.rtw-bremen.de
MX Priorities
- mx.rtw-bremen.de: 40
- mail.rtw-bremen.de: 10
A / AAAA Records
- 185.60.251.251 (no PTR)
Mail Server IPs
- 217.91.198.91 ↩ mx.rtw-bremen.de
- 80.245.142.165 ↩ mail.rtw-bremen.de
SOA Record
Raw SOA
dns01-tld.t-online.de dns.telekom.de 2024012404 21600 3600 604800 86400
Primary NS (mname)
dns01-tld.t-online.de
Admin Email (rname)
dns@telekom.de
Serial
2024012404
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 mx a:mail.rtw-bremen.de a:mx.rtw-bremen.de ~all
📊 DNS lookups: 4/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
✗ MissingNo DMARC record — emails cannot be rejected on auth failure.
DKIM Selectors
✓ 1 found
dkim._domainkey
✓ Public key: 216 chars (valid)
✓ DKIM properly configured for selector: dkim
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
1 record- SPFv=spf1 mx a:mail.rtw-bremen.de a:mx.rtw-bremen.de ~all
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