Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
skf-konstanz.de
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-27 12:13:51 UTC · ↺ Refresh
MX Hostnames
- skfkonstanz-de0i.mail.eo.outlook.com
MX Priorities
- skfkonstanz-de0i.mail.eo.outlook.com: 10
A / AAAA Records
- 80.72.140.180 (no PTR)
Mail Server IPs
- 52.101.68.8 ↩ mail-du0pr03cu00100.inbound.protection.outlook.com
- 52.101.68.27 ↩ mail-db7pr03cu00503.inbound.protection.outlook.com
- 52.101.73.4 ↩ mail-am0pr83cu00404.inbound.protection.outlook.com
- 52.101.73.19 ↩ mail-as8pr04cu00803.inbound.protection.outlook.com
- 2a01:111:f403:ca04::a ↩ mail-du0pr03cu00102.inbound.protection.outlook.com
- 2a01:111:f403:ca09:: ↩ mail-am3pr04cu00500.inbound.protection.outlook.com
- 2a01:111:f403:ca04::2 ↩ mail-du2pr03cu00102.inbound.protection.outlook.com
- 2a01:111:f403:ca04::10 ↩ mail-dbapr03cu00100.inbound.protection.outlook.com
SOA Record
Raw SOA
ns1054.ui-dns.biz hostmaster.1und1.de 2017072627 28800 7200 604800 300
Primary NS (mname)
ns1054.ui-dns.biz
Admin Email (rname)
hostmaster@1und1.de
Serial
2017072627
Refresh
28800s
Retry
7200s
Expire
604800s
Minimum TTL
300s
Nameservers (NS)
ns1054.ui-dns.biz
ns1054.ui-dns.org
ns1054.ui-dns.de
ns1054.ui-dns.com
SPF Record
✓ Soft Fail (~all)
v=spf1 ip4:109.90.122.100 include:spf.protection.outlook.com ~all
📊 DNS lookups: 1/10
~ 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
3 records- v=verifydomain MS=4848411
- apple-domain-verification=bp5BeeNHEf02oBE5
- SPFv=spf1 ip4:109.90.122.100 include:spf.protection.outlook.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 skf-konstanz.de
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits