Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
achtzehn.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-04-02 07:27:42 UTC · ↺ Refresh
MX Hostnames
- smtp.achtzehn.eu
- smtp2.achtzehn.eu
MX Priorities
- smtp.achtzehn.eu: 100
- smtp2.achtzehn.eu: 200
A / AAAA Records
- 167.86.125.208 ↩ server05.achtzehn.eu
- 2a02:c207:3004:202::1 ↩ server05.achtzehn.eu
Mail Server IPs
- 167.86.125.208 ↩ server05.achtzehn.eu
- 2a02:c207:3004:202::1 ↩ server05.achtzehn.eu
- 82.165.71.47 ↩ server03.achtzehn.eu
- 2a01:239:2cb:8000::1 (no PTR)
SOA Record
Raw SOA
ns4.achtzehn.de andreas.achtzehn.de 2026040205 28800 7200 604800 1800
Primary NS (mname)
ns4.achtzehn.de
Admin Email (rname)
andreas@achtzehn.de
Serial
2026040205
Refresh
28800s
Retry
7200s
Expire
604800s
Minimum TTL
1800s
Nameservers (NS)
ns3.achtzehn.de
ns4.achtzehn.de
SPF Record
✓ Strict (-all)
v=spf1 mx -all
📊 DNS lookups: 1/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine; fo=1; pct=100; rua=mailto:[email protected]; ruf=mailto:[email protected];
~ Quarantine — good protection (failing mail goes to spam)
📋 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- google-site-verification=r-6d_p6MtRppyLoAc-7LOK0L5BQppSQUi9Q2DkU8CF0
- SPFv=spf1 mx -all
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