Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
rkw-kehl.de
Yes
✓ Yes
Barracuda
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-28 13:13:10 UTC · ↺ Refresh
MX Hostnames
- d304370.b.ess.de.barracudanetworks.com
- d304370.a.ess.de.barracudanetworks.com
MX Priorities
- d304370.b.ess.de.barracudanetworks.com: 20
- d304370.a.ess.de.barracudanetworks.com: 10
A / AAAA Records
- 145.253.137.51 ↩ exchange.rkw-kehl.de
- 2a03:2a00:1200::1:0:0:3106 ↩ r936.agenturserver.it
Mail Server IPs
- 18.185.115.251 ↩ mail.ess.de.barracuda.com
- 18.185.115.250 ↩ mail.ess.de.barracuda.com
- 18.185.115.252 ↩ mail.ess.de.barracuda.com
SOA Record
Raw SOA
ns1074.ui-dns.org hostmaster.1und1.com 2017060123 28800 7200 604800 600
Primary NS (mname)
ns1074.ui-dns.org
Admin Email (rname)
hostmaster@1und1.com
Serial
2017060123
Refresh
28800s
Retry
7200s
Expire
604800s
Minimum TTL
600s
Nameservers (NS)
ns1052.ui-dns.de
ns1071.ui-dns.com
ns1074.ui-dns.org
ns1103.ui-dns.biz
SPF Record
✓ Strict (-all)
v=spf1 ip4:145.253.137.51 ip4:192.168.107.217 -all
📊 DNS lookups: 0/10
✓ Hard fail (-all) — strict 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
2 records- DMARCv=DMARC1;p=reject;
- SPFv=spf1 ip4:145.253.137.51 ip4:192.168.107.217 -all
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