Open
Cached
·
just now
88/100
SECURITY SCORE
Detected Technologies
Certificate Information
Subject
CN=stamps.com
Issuer
C=US, O=Let's Encrypt, CN=R12
Valid From
April 01, 2026
Valid Until
June 30, 2026
52 days
Public Key
RSA
2048 bit
Adequate
Signature Algorithm
SHA256-RSA
SHA-256 Fingerprint
00:98:9A:F4:1D:6D:1E:71:1F:4E:09:1A:9A:51:C5:01:E0:BC:A6:ED:32:B3:42:92:EF:84:06:8B:68:4C:2C:63
Alternative Names
Security Configuration
TLS Protocols
TLS 1.2
TLS 1.3
Forward Secrecy
Supported
(Modern clients use PFS)
HTTP Security Headers
Status
Strict-Transport-Security
Present
max-age=3600; includeSubDomains
X-Frame-Options
Missing
Not configured
X-Content-Type-Options
Good
nosniff
Referrer-Policy
Good
strict-origin
Permissions-Policy
Present
geolocation=(), midi=(), sync-xhr=(); +6 more
Recommendations
- • Increase HSTS max-age to at least 1 year and add includeSubDomains
- • Improve CSP by adding more specific directives and removing 'unsafe-inline'
- • Add X-Frame-Options: DENY or SAMEORIGIN to prevent clickjacking
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
70 domains
stamps.com
content.stamps.com
print.stamps.com
print2.stamps.com
registration.stamps.com
staging-registration.stamps.com
stm-api.stamps.com
swsim.stamps.com
testing.stamps.com
webpostage.stamps.com
wp.stamps.com
www.stamps.com
account.web.stamps.com
app.web.stamps.com
content.testing.stamps.com
history.web.stamps.com
login.testing.stamps.com
print.testing.stamps.com
print2.testing.stamps.com
registration.qa001.stamps.com
registration.qa004.stamps.com
sdcwebsite.dev.stamps.com
sdcwebsite.staging.stamps.com
signin.qa002.stamps.com
stm-api.dev02.stamps.com
stm-api.testing.stamps.com
swsim.testing.stamps.com
account.web.testing.stamps.com
account.endicia.com
account.web.endicia.com
account.web.testing.endicia.com
accountext.qasc.endicia.com
content.endicia.com
developer.endicia.com
developer.testing.endicia.com
history.web.endicia.com
label.endicia.com
print.endicia.com
print.testing.endicia.com
print2.testing.endicia.com
registration.endicia.com
registration.staging.endicia.com
registration.testing.endicia.com
swsim.endicia.com
testing.endicia.com
www.endicia.com
www.qa004.endicia.com
www.stage.endicia.com
api.prd.goglobalpost.com
api.stg.goglobalpost.com
dev.goglobalpost.com
portal.goglobalpost.com
postage.internetpostage.com
postage.staging.internetpostage.com
us.mytracking.net
api.shippingeasy.com
app.shippingeasy.com
slush.shippingeasy.com
staging.shippingeasy.com
registration.shipworks.com
registration.staging.shipworks.com
usps.stampsendicia.net
uspsportal.staging.stampsendicia.net
admin.testaspen.com
api.testaspen.com
platform.testaspen.com
devportal.stg.yourglobalpost.com
public.prd.yourglobalpost.com
public.stg.yourglobalpost.com
ssportal.stg.yourglobalpost.com
Other domains in certificate