Domain Overview
DNS: ✓ 20d ago
Checker: ✓ 20d ago
partner.gda.pl
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-05-21 01:35:21 UTC · ↺ Refresh
MX Hostnames
- u301.linux.pl
MX Priorities
- u301.linux.pl: 10
A / AAAA Records
- 51.255.200.218 ↩ serwer.informatyk.net.pl
Mail Server IPs
- 77.55.252.133 ↩ u301.linux.pl
SOA Record
Raw SOA
serwer.informatyk.net.pl biuro.informatyk.net.pl 2026020403 3600 600 86400 86400
Primary NS (mname)
serwer.informatyk.net.pl
Admin Email (rname)
biuro@informatyk.net.pl
Serial
2026020403
Refresh
3600s
Retry
600s
Expire
86400s
Minimum TTL
86400s
Nameservers (NS)
fns1.42.pl
fns2.42.pl
serwer.informatyk.net.pl
partner2.informatyk.net.pl
SPF Record
✓ Strict (-all)
v=spf1 a mx ip4:95.216.27.223 ip4:95.216.231.165 ip4:77.55.252.133 -all
📊 DNS lookups: 2/10
✓ Hard fail (-all) — strict 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
1 record- SPFv=spf1 a mx ip4:95.216.27.223 ip4:95.216.231.165 ip4:77.55.252.133 -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 · Customize →
See demo & docs
Deep verification
Full email verification for partner.gda.pl
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits