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=posteio.de
Issuer
C=US, O=Let's Encrypt, CN=R12
Valid From
February 20, 2026
Valid Until
May 21, 2026 87 days
Public Key
RSA 4096 bit Strong
Signature Algorithm
SHA256-RSA
SHA-256 Fingerprint
23:BC:C5:C1:2B:CF:EC:19:17:96:9A:AC:CE:AC:6E:B7:84:CE:C0:0B:73:92:C5:DB:30:64:07:FD:30:EB:71:8F
Alternative Names
89 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

89 domains
posteio.de *.posteio.de *.dev.posteio.de

Other domains in certificate

b2bamfam.com *.b2bamfam.com *.buccpiydyi.b2bamfam.com *.m.b2bamfam.com *.ytz3ekx5rd.b2bamfam.com
bsintelligence.com *.bsintelligence.com
carrotcake.co *.carrotcake.co
*.0e3cd5b5-b285-46f9-8a75-f35984cc1e87.coiinmarketcap.com *.app.coiinmarketcap.com coiinmarketcap.com *.coiinmarketcap.com *.m.coiinmarketcap.com *.notexistsadmin.coiinmarketcap.com *.rdweb.coiinmarketcap.com *.rjhmum.coiinmarketcap.com *.vpn.coiinmarketcap.com *.ww8.coiinmarketcap.com *.www.coiinmarketcap.com *.www6.coiinmarketcap.com
*.80feb221-1edb-4ccc-96a7-ce7a13c8073d.indiahomeinsurance.in *.8b82c451-537e-401f-9c77-2aa3eea933e3.indiahomeinsurance.in *.8b941448-ac3f-41d3-89f2-16deb964fa5a.indiahomeinsurance.in *.adcdacf9-130e-4ee4-b9e1-284e076f19f5.indiahomeinsurance.in *.admin.indiahomeinsurance.in *.api.indiahomeinsurance.in *.app.indiahomeinsurance.in *.assets.indiahomeinsurance.in *.bbs.indiahomeinsurance.in *.bi.indiahomeinsurance.in *.blog.indiahomeinsurance.in *.cpanel.indiahomeinsurance.in *.cpcalendars.indiahomeinsurance.in *.cpcontacts.indiahomeinsurance.in *.da73c27c-4669-4d19-b38a-ad0c481879b8.indiahomeinsurance.in *.demo.indiahomeinsurance.in *.dev.indiahomeinsurance.in *.hostmaster.indiahomeinsurance.in indiahomeinsurance.in *.indiahomeinsurance.in *.m.indiahomeinsurance.in *.mail.indiahomeinsurance.in *.test.indiahomeinsurance.in *.webdisk.indiahomeinsurance.in *.webmail.indiahomeinsurance.in *.www.indiahomeinsurance.in
lgogoal23.org *.lgogoal23.org
longfeng93.top *.longfeng93.top
mama88.vip *.mama88.vip
mamchurianchip.com *.mamchurianchip.com
mbvf524gxxd.top *.mbvf524gxxd.top
mfywh.co *.mfywh.co
mgu56.top *.mgu56.top
motoflgomovers.com *.motoflgomovers.com
moversfl2newhampshire.com *.moversfl2newhampshire.com
oucellss.com *.oucellss.com
oumichaicafe.com *.oumichaicafe.com
p7985fb.cyou *.p7985fb.cyou
pakart.org *.pakart.org
palantir.lol *.palantir.lol
pdf-software-jp-5677.click *.pdf-software-jp-5677.click
*.hostmaster.salarycalculator.it salarycalculator.it *.salarycalculator.it
yuziki.com *.yuziki.com
ywy6.com *.ywy6.com
zezui.cc *.zezui.cc