Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
stoneconcepts.nl
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-24 21:50:10 UTC · ↺ Refresh
MX Hostnames
- stoneconcepts-nl.mail.protection.outlook.com
- stoneconcepts-nl01c.mail.protection.outlook.com
MX Priorities
- stoneconcepts-nl01c.mail.protection.outlook.com: 5
- stoneconcepts-nl.mail.protection.outlook.com: 0
A / AAAA Records
- 91.184.11.163
Mail Server IPs
- 52.101.68.21 ↩ mail-db4pr02cu00205.inbound.protection.outlook.com
- 52.101.68.39 ↩ mail-db7pr03cu00607.inbound.protection.outlook.com
- 52.101.73.19 ↩ mail-as8pr04cu00803.inbound.protection.outlook.com
- 52.101.73.16 ↩ mail-as2pr05cu00100.inbound.protection.outlook.com
- 2a01:111:f403:ca09::4 ↩ mail-am0pr04cu00504.inbound.protection.outlook.com
- 2a01:111:f403:ca09::1 ↩ mail-as9pr07cu00301.inbound.protection.outlook.com
- 2a01:111:f403:ca04::1 ↩ mail-db7pr03cu00401.inbound.protection.outlook.com
- 2a01:111:f403:ca09:: ↩ mail-am3pr04cu00500.inbound.protection.outlook.com
- 52.101.73.11 ↩ mail-am1pr04cu00103.inbound.protection.outlook.com
- 52.101.68.15 ↩ mail-db6pr03cu00107.inbound.protection.outlook.com
- 52.101.68.32
SOA Record
Raw SOA
ns02.kbitehosting.nl leon.kbite.nl 2024051005 10800 3600 1209600 10800
Primary NS (mname)
ns02.kbitehosting.nl
Admin Email (rname)
leon@kbite.nl
Serial
2024051005
Refresh
10800s
Retry
3600s
Expire
1209600s
Minimum TTL
10800s
Nameservers (NS)
ns02.kbitehosting.nl
ns01.kbitehosting.nl
SPF Record
✓ Strict (-all)
v=spf1 mx a ip4:178.20.253.153 ip4:91.184.11.163 include:_spf.kbitehosting.nl include:spf.protection.outlook.com include:_spf.exactonline.nl include:spf.flowmailer.net -all
📊 DNS lookups: 6/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine; adkim=s; aspf=s
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Strict
· DKIM alignment: Strict
⚠ No aggregate reports (rua= not set)
DKIM Selectors
✓ 2 found
selector1._domainkey
selector2._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
1 record- SPFv=spf1 mx a ip4:178.20.253.153 ip4:91.184.11.163 include:_spf.kbitehosting.nl include:spf.protection.outlook.com include:_spf.exactonline.nl include:spf.flowmailer.net -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 stoneconcepts.nl
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits