Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
f-kub.org
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-23 03:52:24 UTC · ↺ Refresh
MX Hostnames
- mx1.agenturserver.de
- mx3.agenturserver.de
- mx2.agenturserver.de
- mx4.agenturserver.de
MX Priorities
- mx1.agenturserver.de: 10
- mx3.agenturserver.de: 20
- mx2.agenturserver.de: 10
- mx4.agenturserver.de: 50
A / AAAA Records
- 31.220.124.141 (no PTR)
Mail Server IPs
- 185.15.192.56 ↩ mx1.agenturserver.de
- 185.15.192.58 ↩ mx3.agenturserver.de
- 185.15.192.57 ↩ mx2.agenturserver.de
- 185.15.192.59 ↩ mx4.agenturserver.de
SOA Record
Raw SOA
ns01.agenturserver.de support.mittwald.de 1761046867 28800 7200 604800 3600
Primary NS (mname)
ns01.agenturserver.de
Admin Email (rname)
support@mittwald.de
Serial
1761046867
Refresh
28800s
Retry
7200s
Expire
604800s
Minimum TTL
3600s
Nameservers (NS)
ns01.agenturserver.co
ns01.agenturserver.de
ns01.agenturserver.it
SPF Record
✓ Strict (-all)
v=spf1 include:agenturserver.de include:_spf.zimpel.de -all
📊 DNS lookups: 2/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✗ p=none
v=DMARC1; p=none; rua=mailto:[email protected]
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 1 found
mail._domainkey
✓ Public key: 216 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
2 records- SPFv=spf1 include:agenturserver.de include:_spf.zimpel.de -all
- brevo-code:478a9e33a08e5b02fb4b998867d5d0a2
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