DNS Gurus
Cached · just now
76/100 SECURITY SCORE

Detected Technologies

See all in URL Inspect 1
Let's Encrypt logo Let's Encrypt

Certificate Information

Subject
CN=combinedinbox.com
Issuer
C=US, O=Let's Encrypt, CN=R12
Valid From
April 21, 2026
Valid Until
July 20, 2026 58 days
Public Key
RSA 4096 bit Strong
Signature Algorithm
SHA256-RSA
SHA-256 Fingerprint
C8:3E:F2:07:C4:51:19:88:2D:F1:65:4B:92:7D:A6:F6:41:92:74:0C:19:FD:6E:E5:90:B4:09:85:B9:A5:23:87
Alternative Names
90 domains

Security Configuration

TLS Protocols
TLS 1.2 TLS 1.3
Forward Secrecy
Supported (Modern clients use PFS)

HTTP Security Headers

Status
Strict-Transport-Security
Missing
Not configured
Content-Security-Policy
Missing
Not configured Analyze
Content-Security-Policy-Report-Only
Missing
Not configured Analyze
X-Frame-Options
Missing
Not configured
X-Content-Type-Options
Missing
Not configured
Referrer-Policy
Missing
Not configured
Permissions-Policy
Missing
Not configured
Recommendations
  • • Add Strict-Transport-Security header with max-age of at least 1 year
  • • Add Content-Security-Policy header to prevent XSS attacks
  • • Add X-Frame-Options: DENY or SAMEORIGIN to prevent clickjacking
  • • Add X-Content-Type-Options: nosniff
  • • Add Referrer-Policy header (recommended: strict-origin-when-cross-origin)
  • • Consider adding Permissions-Policy to control browser features

CAA Records (Certificate Authority Authorization)

CAA Records
Not Configured (Any CA can issue certificates)
CAA Issues
  • • No CAA records configured - any CA can issue certificates
Recommendations
  • • Implement CAA records to restrict which CAs can issue certificates for your domain
  • • This adds an extra layer of security against unauthorized certificate issuance
  • • Example: Add CAA record 'example.com. CAA 0 issue "letsencrypt.org"'
  • • Consider adding 'iodef' record to receive security incident reports

Subject Alternative Names

90 domains
overhei.nl *.overhei.nl *.1.overhei.nl *.admin.overhei.nl *.bi.overhei.nl *.crm.overhei.nl *.dash.overhei.nl *.forecast.overhei.nl *.lime.overhei.nl *.login.overhei.nl *.lokaleregelgeving.overhei.nl *.m.overhei.nl *.mij.overhei.nl *.mijn.overhei.nl *.omgevingswet.overhei.nl *.regelgeving.overhei.nl *.reporting.overhei.nl *.rijksportaal.overhei.nl *.superset.overhei.nl *.wette.overhei.nl *.wetten.overhei.nl *.ww1.overhei.nl *.ww12.overhei.nl

Other domains in certificate

combinedinbox.com *.combinedinbox.com *.sharepoint.combinedinbox.com
*.4902ffc4-6758-4691-a279-9ae48379d945.locallisted.com *.acceso.locallisted.com *.access.locallisted.com *.adfs01.locallisted.com *.admin.locallisted.com *.agate.locallisted.com *.app01.locallisted.com *.apps1.locallisted.com *.appserver.locallisted.com *.appsrv01.locallisted.com *.aremoto.locallisted.com *.beta.locallisted.com *.blog.locallisted.com *.cloud3.locallisted.com *.com.locallisted.com *.cw.locallisted.com *.demo.locallisted.com *.desktops.locallisted.com *.erp.locallisted.com *.erpcloud.locallisted.com *.evs.locallisted.com *.fs.locallisted.com *.home.locallisted.com *.hosting.locallisted.com *.hostmaster.locallisted.com locallisted.com *.locallisted.com *.my.locallisted.com *.myapps.locallisted.com *.new.locallisted.com *.news.locallisted.com *.pop.locallisted.com *.portal.locallisted.com *.rdgate.locallisted.com *.rdgw2.locallisted.com *.rdm.locallisted.com *.rdp.locallisted.com *.rdswa.locallisted.com *.rdw.locallisted.com *.remote.locallisted.com *.rs.locallisted.com *.saas.locallisted.com *.securegw.locallisted.com *.store.locallisted.com *.tclock.locallisted.com *.test.locallisted.com *.v2.locallisted.com *.vdesktop.locallisted.com *.wap.locallisted.com *.webmail.locallisted.com *.workspace.locallisted.com *.ww38.locallisted.com
*.cvj.optovision.co optovision.co *.optovision.co *.sitemaps.optovision.co
*.insight.stayhealthynow.co *.mail.stayhealthynow.co stayhealthynow.co *.stayhealthynow.co *.www.stayhealthynow.co
*.forum.sunrise-management.com sunrise-management.com *.sunrise-management.com