Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
rbk.nl
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-25 22:32:10 UTC · ↺ Refresh
MX Hostnames
- mx-01-eu-central-1.prod.hydra.sophos.com
- mx-02-eu-central-1.prod.hydra.sophos.com
MX Priorities
- mx-02-eu-central-1.prod.hydra.sophos.com: 20
- mx-01-eu-central-1.prod.hydra.sophos.com: 10
A / AAAA Records
- 185.173.20.172 ↩ perky-mouse.sys.rootnet.io
- 2a0b:3100:20::7b ↩ perky-mouse.sys.rootnet.io
Mail Server IPs
- 18.159.237.67 ↩ ec2-18-159-237-67.eu-central-1.compute.amazonaws.com
- 52.57.79.230 ↩ ec2-52-57-79-230.eu-central-1.compute.amazonaws.com
SOA Record
Raw SOA
ns0.transip.net hostmaster.transip.nl 2026012000 86400 1800 2419200 300
Primary NS (mname)
ns0.transip.net
Admin Email (rname)
hostmaster@transip.nl
Serial
2026012000
Refresh
86400s
Retry
1800s
Expire
2419200s
Minimum TTL
300s
Nameservers (NS)
ns2.transip.eu
ns0.transip.net
ns1.transip.nl
SPF Record
✓ Strict (-all)
v=spf1 a mx ip4:92.67.151.90 include:spf.protection.outlook.com include:spf.eu.exclaimer.net include:mailfilter.myrootnet.nl include:145961254.spf02.hubspotemail.net -all
📊 DNS lookups: 6/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✗ p=none
v=DMARC1; p=none
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
⚠ 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
4 records- sophos-domain-verification=24a8e3876f508709239905debbd26b499fddd755
- MS=ms80049308
- SPFv=spf1 a mx ip4:92.67.151.90 include:spf.protection.outlook.com include:spf.eu.exclaimer.net include:mailfilter.myrootnet.nl include:145961254.spf02.hubspotemail.net -all
- mandrill_verify.kbV8yu-jBAOJAhZlOmpVEA
Full email verification for rbk.nl
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