Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
sibelco.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-30 05:44:55 UTC · ↺ Refresh
MX Hostnames
- sibelco-com.mail.protection.outlook.com
MX Priorities
- sibelco-com.mail.protection.outlook.com: 0
A / AAAA Records
- 13.107.246.67 (no PTR)
Mail Server IPs
- 52.101.68.8 ↩ mail-du0pr03cu00100.inbound.protection.outlook.com
- 52.101.68.32 ↩ mail-db3pr0202cu00200.inbound.protection.outlook.com
- 52.101.73.22 ↩ mail-am7pr05cu00106.inbound.protection.outlook.com
- 52.101.73.30 ↩ mail-am7pr05cu00306.inbound.protection.outlook.com
- 2a01:111:f403:ca04::a ↩ mail-du0pr03cu00102.inbound.protection.outlook.com
- 2a01:111:f403:ca09::b ↩ mail-am7pr05cu00103.inbound.protection.outlook.com
- 2a01:111:f403:ca09::6 ↩ mail-am4pr0401cu00106.inbound.protection.outlook.com
- 2a01:111:f403:ca09::d ↩ mail-as9pr05cu01305.inbound.protection.outlook.com
SOA Record
Raw SOA
ns53.be admin.sibelco.com 2026030902 3600 600 1209600 3600
Primary NS (mname)
ns53.be
Admin Email (rname)
admin@sibelco.com
Serial
2026030902
Refresh
3600s
Retry
600s
Expire
1209600s
Minimum TTL
3600s
Nameservers (NS)
ns53.be
ns53.io
SPF Record
✓ Strict (-all)
v=spf1 include:spf.flexmail.eu include:_spf.sibelco.com include:_spf.afasonline.nl include:spf.protection.outlook.com include:servers.mcsv.net include:_spf.salesforce.com include:spf.smtp2go.com include:_vccnets.8x8.com -all
📊 DNS lookups: 8/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine; rua=mailto:[email protected]
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 5 found
selector1._domainkey
selector2._domainkey
k1._domainkey
s1._domainkey
s2._domainkey
✓ DKIM properly configured for selector: selector1
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
14 records- _globalsign-domain-verification=HKVDdZBNLHcNw9Ezz5u03i08zdjV1eyJH5kBShOCoo
- amazonses:bQmBVIN+qA/R7bg7+lNI9A8QoVZ4oatg4wB72lbz3t4=
- globalsign-domain-verification=wU2VdJVHiteCsm4QpAuKvxGw_clP39YIf1ieNlCtpr
- RPdMQJex+wcUNE1cyZ7BeJRqZldJhkhA5Hv/MtGWvMY=
- fHtP8XNi/fW9uNXkuf2VJSMif9txRTBp4in8qqHFaMcJzztn9WpNH1sLCGrxhEh59AZOEf7gGErVt02ilrmJ9g==
- _globalsign-domain-verification=bNMsw1v6NZsqQ7qCVjjymzlSMed2X1ZmZdawhtIRxv
- sqgimmp1J7HbKywE3sRo6y7LlL74fmdOg5xxmOpxHk4=
- autodesk-domain-verification=RXBQblGvUc_uiQHFMJZN
- amazonses:oO2jymhws4KGOLWNhhtZ/oeXNUaRE5R3of12IA4xQAw=
- globalsign-domain-verification=gtJysTFsDBi0Gpoqk2VAFAgKApaFElmGXsySfcF_mx
- dvv-domain-verification=pa8o935ua9pui98-apuhica
- globalsign-domain-verification=t5Ctus0ZQhrX8OOKpYes7_5_k6h3Wva4ygStPnHk-y
- _globalsign-domain-verification=c-4Kj9SBawN6WtvM3zi4ofLBgnDyihAsVuneV3djLF
- SPFv=spf1 include:spf.flexmail.eu include:_spf.sibelco.com include:_spf.afasonline.nl include:spf.protection.outlook.com include:servers.mcsv.net include:_spf.salesforce.com include:spf.smtp2go.com include:_vccnets.8x8.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 sibelco.com
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits