Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
bb-rt.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-27 09:47:04 UTC · ↺ Refresh
MX Hostnames
- mail.mfgast.de
MX Priorities
- mail.mfgast.de: 1
A / AAAA Records
- 91.99.200.0 ↩ app1.srv.guentherits.de
Mail Server IPs
- 162.55.185.234 ↩ mail.mfgast.de
SOA Record
Raw SOA
hydrogen.ns.hetzner.com dns.hetzner.com 2026021500 86400 10800 3600000 3600
Primary NS (mname)
hydrogen.ns.hetzner.com
Admin Email (rname)
dns@hetzner.com
Serial
2026021500
Refresh
86400s
Retry
10800s
Expire
3600000s
Minimum TTL
3600s
Nameservers (NS)
helium.ns.hetzner.de
hydrogen.ns.hetzner.com
oxygen.ns.hetzner.com
SPF Record
✓ Soft Fail (~all)
v=spf1 mx a:mail.guenther-its.de ~all
📊 DNS lookups: 2/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
✗ MissingNo DMARC record — emails cannot be rejected on auth failure.
DKIM Selectors
✓ 13 found
google._domainkey
selector1._domainkey
selector2._domainkey
default._domainkey
mail._domainkey
dkim._domainkey
k1._domainkey
s1._domainkey
s2._domainkey
zoho._domainkey
sendgrid._domainkey
mxvault._domainkey
amazonses._domainkey
⚠ Public key (p=) missing in DKIM record for selector google.
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
1 record- SPFv=spf1 mx a:mail.guenther-its.de ~all
Full email verification for bb-rt.de
Run SMTP check, SPF/DKIM/DMARC and catch-all detection.
SPF / DKIM / DMARC Get 1,000 Free Credits