Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
duojusttwo.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-21 19:26:24 UTC · ↺ Refresh
MX Hostnames
- mail.duojusttwo.de
MX Priorities
- mail.duojusttwo.de: 0
A / AAAA Records
- 23.236.62.147 ↩ 147.62.236.23.bc.googleusercontent.com
Mail Server IPs
- 45.10.26.3 ↩ server6.rainbow-web.com
- 2a0a:51c0::11:0:0:0:2 ↩ server6.rainbow-web.com
SOA Record
Raw SOA
ns1.rainbow-web.com webmaster.rainbow-web.com 1773361492 10800 3600 604800 900
Primary NS (mname)
ns1.rainbow-web.com
Admin Email (rname)
webmaster@rainbow-web.com
Serial
1773361492
Refresh
10800s
Retry
3600s
Expire
604800s
Minimum TTL
900s
Nameservers (NS)
ns1.rainbow-web.com
ns2.rainbow-web.com
ns3.rainbow-web.com
SPF Record
✓ Soft Fail (~all)
v=spf1 a mx include:_spf.google.com ~all
📊 DNS lookups: 3/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
✗ p=none
v=DMARC1; p=none; adkim=r; aspf=r
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
⚠ No aggregate reports (rua= not set)
DKIM Selectors
✓ 1 found
default._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
1 record- SPFv=spf1 a mx include:_spf.google.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
See demo & docs
Deep verification
Full email verification for duojusttwo.de
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits