89/100 SECURITY SCORE

Certificate Information

Subject
CN=mail.exp-lab.com
Issuer
C=US, O=Let's Encrypt, CN=R13
Valid From
January 16, 2026
Valid Until
April 16, 2026 78 days
Public Key
RSA 2048 bit Adequate
Signature Algorithm
SHA256-RSA
SHA-256 Fingerprint
11:F7:9E:3A:20:82:9A:6E:D4:C2:02:4A:56:23:F5:27:56:0C:35:3D:D8:C6:42:A4:1E:D8:70:FC:38:85:C2:30
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
Excellent
max-age=64072000; includeSubDomains; preload
Content-Security-Policy
Missing
Not configured
X-Frame-Options
Good
SAMEORIGIN
X-Content-Type-Options
Good
nosniff
Referrer-Policy
Missing
Not configured
Permissions-Policy
Missing
Not configured
Recommendations
  • Add Content-Security-Policy header to prevent XSS attacks
  • 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
Configured (Restricts certificate issuance)
Current Issuer
Authorized (Matches CAA policy)
Recommendations
  • Consider using critical flag (flags=128) for stricter CAA enforcement
  • Consider adding 'iodef' records to receive notifications about unauthorized certificate issuance attempts
  • Consider adding 'issuewild' records to control wildcard certificate issuance

Subject Alternative Names

86 domains
webmail.sergio-ind.com

Other domains in certificate

mail.10229.net
mail.3icperu.com
mail.4waycontractors.com
mail.admlawyers.org
webmail.adsarquitetura.com.br
mail.alfrey.org
mail.allstarestimation.com
mail.alvinasschools.org
mail.auraclim.ca
mail.bacovin.net
mail.bcrcpride.ca
mail.bmtrims.com
mail.cabinetsgenius.com
mail.cachia.com
mail.caregigs.co
mail.ceramx.ae
mail.clementlabs.com
mail.cmc-ltd.sa
mail.columbusinpatientcare.com
mail.pioneerpsa.com.ph
mail.devkrea8.tech
mail.dimenfour.com
mail.dtcng.com
mail.eg-fit.com
mail.elcarmenhotel.com
webmail.encoremsi.com
mail.escolakingdom.com.br
mail.exp-lab.com
mail.femalescholars.org
mail.flick.ae
mail.gatbank.com
mail.gentysolutions.com
webmail.govertical.media
mail.grupocopresa.com
mail.harrisinfotech.com
mail.ihrke.net
mail.incommbiz.com
mail.ivmx.org
mail.lagosfireworks.com
correo.linea24peru.com.pe
email.link4.gt
mail.lords.academy
mail.lovic.ba
mail.lushan.io
email.marsiling.sg
mail.mateam.net
mail.mediscanstaffing.com
mail.milson-packing.com
mail.monjua.com.br
mail.mydatawise.com
mail.norttech.com
mail.octoadvisory.com
mail.patriotrising.tech
mail.philoxenia.online
mail.pixelprints.studio
mail.pr-one.com
mail.purefill.mx
mail.radiomelodia.com.pe
mail.relatoriosinteligentes.com
webmail.renaciente.com
correo.romeroreyes.com
mail.rtsinc.services
mail.rvpilgrims.com
email.setmycompany.com
mail.shakaaraahllc.com
mail.shouchengbio.com
mail.sti.com.co
mail.studio3.pictures
mail.swyn.net
mail.tcontur.com
mail.tcwplus.com
mail.tekniteedng.com
webmail.touchpointoffice.com
mail.truonghaishipinternational.com
mail.vhrcentropediatricoips.com
mail.viniegypt.com
mail.virtualmediang.com
mail.wegionl.xyz
mail.wer-fitness.com
mail.whitehead.one
mail.wolcott.xyz
mail.woodboxer.com
mail.xuanthuytas.vn
mail.yaheetech.us
wmail.zumbashop-sea.com