Live data — DNS records and disposable check were just fetched and saved.
Domain Overview
DNS: ⚡ live
Checker: ⚡ live
extern.insel.ch
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-10-29 19:22:34 UTC · ↺ Refresh
MX Hostnames
- mx2.t-systems.ch
- mx1.t-systems.ch
MX Priorities
- mx2.t-systems.ch: 10
- mx1.t-systems.ch: 10
A / AAAA Records
- 161.62.248.145 ↩ www2.insel.ch
Mail Server IPs
- 193.192.231.129 ↩ mx2.t-systems.ch
- 193.192.231.130 ↩ mx1.t-systems.ch
SOA Record
No SOA record found.
Nameservers (NS)
No nameservers found.
SPF Record
✓ Soft Fail (~all)
v=spf1 mx ip4:193.247.208.0/24 ip4:161.62.0.0/16 ip4:31.11.29.203 ip4:31.11.29.204 ip4:195.48.54.53 ip4:80.74.152.50 include:_spf.retarus.com include:spf.umantis.com ~all
📊 DNS lookups: 3/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
✗ MissingNo DMARC record — emails cannot be rejected on auth failure.
DKIM Selectors
✗ None detectedNo DKIM records found for common selectors — your provider may use a custom selector name.
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
4 records- miro-verification=d8d609f815ad3441773a5b60848229dd12769a9d
- cisco-ci-domain-verification=1652f0f88f9848ed4ee915e5ff3e4be493e09f71fa8169354d51be21b8249cd6
- SPFv=spf1 mx ip4:193.247.208.0/24 ip4:161.62.0.0/16 ip4:31.11.29.203 ip4:31.11.29.204 ip4:195.48.54.53 ip4:80.74.152.50 include:_spf.retarus.com include:spf.umantis.com ~all
- apple-domain-verification=RtFqjrUt2paH4iMe
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 extern.insel.ch
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits