Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
plan-energie.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-20 04:15:53 UTC · ↺ Refresh
MX Hostnames
- mail.cubus.de
MX Priorities
- mail.cubus.de: 10
A / AAAA Records
- 46.4.122.105 ↩ fala.cubus.de
Mail Server IPs
- 78.46.64.122 ↩ diva.cubus.de
- 2a01:4f8:120:2393::2 ↩ diva.cubus.de
SOA Record
Raw SOA
nsa3.schlundtech.de ziera.cubus.de 2025092601 43200 7200 1209600 7200
Primary NS (mname)
nsa3.schlundtech.de
Admin Email (rname)
ziera@cubus.de
Serial
2025092601
Refresh
43200s
Retry
7200s
Expire
1209600s
Minimum TTL
7200s
Nameservers (NS)
nsc3.schlundtech.de
nsd3.schlundtech.de
nsb3.schlundtech.de
nsa3.schlundtech.de
SPF Record
✓ Strict (-all)
v=spf1 a mx include:spf.sendinblue.com -all
📊 DNS lookups: 3/10
✓ 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
✓ 2 found
default._domainkey
mail._domainkey
✓ Public key: 216 chars (valid)
✓ DKIM properly configured for selector: default
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
2 records- Sendinblue-code:68fc03d795c15d99b99c9dcc07374280
- SPFv=spf1 a mx include:spf.sendinblue.com -all
Free · No signup required
Add email validation to your forms
Block disposable emails, validate MX records, detect role accounts — unlimited, forever free.
<script src="https://check.verifyswift.com/"></script>
One line of code · Works on any site · Customize →
See demo & docs
Deep verification
Full email verification for plan-energie.de
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits