Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
vsb-infra.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-31 19:58:48 UTC · ↺ Refresh
MX Hostnames
- smtp-backup2.portunity.de
- smtp-backup1.portunity.de
- mail2.schnorpfeil.com
- mail.schnorpfeil.com
MX Priorities
- smtp-backup2.portunity.de: 40
- mail.schnorpfeil.com: 10
- mail2.schnorpfeil.com: 20
- smtp-backup1.portunity.de: 30
A / AAAA Records
- 85.13.154.59 ↩ dd37630.kasserver.com
Mail Server IPs
- 37.120.186.72 ↩ smtp-backup2-2.portunity.de
- 2a03:4000:f:5b9::25 ↩ smtp-backup2-2.portunity.de
- 89.21.96.206 ↩ mail.schnorpfeil.com
- 24.134.17.97 ↩ mail2.schnorpfeil.com
- 217.144.128.54 ↩ smtp-backup1.portunity.de
- 2a02:a00::2:0:0:54 ↩ smtp-backup1.portunity.de
SOA Record
Raw SOA
ns1.your-server.de postmaster.your-server.de 2026010800 86400 10800 3600000 3600
Primary NS (mname)
ns1.your-server.de
Admin Email (rname)
postmaster@your-server.de
Serial
2026010800
Refresh
86400s
Retry
10800s
Expire
3600000s
Minimum TTL
3600s
Nameservers (NS)
ns1.your-server.de
ns3.second-ns.de
ns.second-ns.com
SPF Record
✓ Soft Fail (~all)
v=spf1 a mx ip4:87.139.14.69 ip4:188.210.46.38 ip4:24.134.17.97 ip4:169.155.224.69 include:spf-de.emailsignatures365.com include:spf.protection.outlook.com ~all
📊 DNS lookups: 4/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
✗ p=none
v=DMARC1; p=none;
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
⚠ No aggregate reports (rua= not set)
DKIM Selectors
✓ 2 found
selector1._domainkey
selector2._domainkey
✓ Public key: 392 chars (valid)
✓ DKIM properly configured for selector: selector1
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
2 records- SPFv=spf1 a mx ip4:87.139.14.69 ip4:188.210.46.38 ip4:24.134.17.97 ip4:169.155.224.69 include:spf-de.emailsignatures365.com include:spf.protection.outlook.com ~all
- MS=ms60356102
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 vsb-infra.de
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits