Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
hwkpotsdam.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-24 18:01:20 UTC · ↺ Refresh
MX Hostnames
- mail01.hwk-potsdam.de
MX Priorities
- mail01.hwk-potsdam.de: 10
A / AAAA Records
- 195.145.108.51 (no PTR)
Mail Server IPs
- 91.24.21.42 ↩ mail01.hwk-potsdam.de
SOA Record
Raw SOA
ns1.odav.de webservices.odav.de 2025111901 43200 7200 1209600 86400
Primary NS (mname)
ns1.odav.de
Admin Email (rname)
webservices@odav.de
Serial
2025111901
Refresh
43200s
Retry
7200s
Expire
1209600s
Minimum TTL
86400s
Nameservers (NS)
ns4.odav.de
ns2.odav.de
ns1.odav.de
ns3.odav.de
SPF Record
✓ Soft Fail (~all)
v=spf1 a:mail01.hwk-potsdam.de include:spf.odav.de include:spf.smtp.net include:spf.protection.outlook.com mx ip4:91.24.21.42 ~all
📊 DNS lookups: 5/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
~ Quarantine
v=DMARC1;p=quarantine;pct=100;
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
⚠ No aggregate reports (rua= not set)
DKIM Selectors
✓ 3 found
selector1._domainkey
selector2._domainkey
s1._domainkey
✓ Public key: 216 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
4 records- MS=D7FA4AB71D5337AE0E50740D9011DBE617383FE2
- adobe-idp-site-verification=a4380abbc42cd2e3583b90a167e943d3b46948b8bade27f96c3a99ffb85547bd
- SPFv=spf1 a:mail01.hwk-potsdam.de include:spf.odav.de include:spf.smtp.net include:spf.protection.outlook.com mx ip4:91.24.21.42 ~all
- MS=ms49466242
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 hwkpotsdam.de
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits