Domain Overview
DNS: ✓ 14h ago
Checker: ✓ 14h ago
optics-world.nl
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-05-20 17:33:25 UTC · ↺ Refresh
MX Hostnames
- opticsworld-nl01e.mail.protection.outlook.com
MX Priorities
- opticsworld-nl01e.mail.protection.outlook.com: 0
A / AAAA Records
- 104.21.17.60 (no PTR)
- 172.67.222.250 (no PTR)
- 2606:4700:3036::ac43:defa
- 2606:4700:3031::6815:113c
Mail Server IPs
- 52.101.68.36 ↩ mail-db5pr02cu00104.inbound.protection.outlook.com
- 52.101.73.26 ↩ mail-as9pr05cu01302.inbound.protection.outlook.com
- 52.101.68.32 ↩ mail-db3pr0202cu00200.inbound.protection.outlook.com
- 52.101.68.3 ↩ mail-db7pr03cu00403.inbound.protection.outlook.com
- 2a01:111:f403:ca09:: ↩ mail-am3pr04cu00500.inbound.protection.outlook.com
- 2a01:111:f403:ca04::7 ↩ mail-db4pr02cu00307.inbound.protection.outlook.com
- 2a01:111:f403:ca09::e ↩ mail-am7pr05cu00206.inbound.protection.outlook.com
- 2a01:111:f403:ca04::8 ↩ mail-db5pr02cu00100.inbound.protection.outlook.com
SOA Record
Raw SOA
patrick.ns.cloudflare.com dns.cloudflare.com 2400890287 10000 2400 604800 1800
Primary NS (mname)
patrick.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2400890287
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s
Nameservers (NS)
patrick.ns.cloudflare.com
rosa.ns.cloudflare.com
SPF Record
✓ Strict (-all)
v=spf1 a include:_spf.beehost.eu include:spf.protection.outlook.com -all
📊 DNS lookups: 3/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine
~ 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
default._domainkey
✓ Public key: 392 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
2 records- SPFv=spf1 a include:_spf.beehost.eu include:spf.protection.outlook.com -all
- MS=ms60174312
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 optics-world.nl
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits