89/100 SECURITY SCORE

Certificate Information

Subject
CN=mail.celecolle.com
Issuer
C=US, O=Let's Encrypt, CN=R12
Valid From
January 13, 2026
Valid Until
April 13, 2026 74 days
Public Key
RSA 2048 bit Adequate
Signature Algorithm
SHA256-RSA
SHA-256 Fingerprint
60:FF:D9:AC:3E:62:FD:B2:82:5A:52:E4:16:DF:6C:DE:2A:00:B4:80:01:78:96:49:A3:64:81:77:BD:B7:7C:64
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

83 domains
mail.notjustbots.com

Other domains in certificate

mail.1q12.com
mail.accuplanbenefits.com
mail.adronhomes.com
mail.aerialmetric.com
mail.alammarico.com
mail.amdjentertainment.com
mail.amgcksa.com
mail.anvil-armory.com
mail.vita.art.br
mail.asmpadvogados.com.br
mail.b6tec.com
mail.baricksolutions.ca
mail.celecolle.com
mail.cemeterylettering.ca
mail.cesnb.net
mail.cityuniversityofyangon.com
mail.silvex.com.ng
mail.filmat.com.py
mail.gfm.com.sa
mail.cowriemedical.com
mail.cruz.cr
mail.digerati-experts.com
mail.educonsult.edu.np
mail.electricretina.com
mail.exeotechnology.com
mail.famposo.com
mail.fvafinancieros.com
mail.gammaseafood.com
mail.generalpaint.biz
mail.gesgsolutions.com
mail.getviacloud.com
mail.ghsaviationgroup.aero
mail.gproare.mx
webmail.handytech.com.br
mail.healthians.net
mail.heart-life-empowered.com
mail.honscript.com
mail.huilin.net
mail.i3-vietnam.tech
mail.ideafarm.in
login.ie.gt
mail.ifrrm.com
mail.imobilia.re
mail.indozilla.com
mail.inn.moe
login.instiq.com
mail.jcb.dev
mail.kerissolutions.com
mail.largo.id
webmail.legalplus.com.br
mail.lisaampil.com
mail.lpnb.ca
mail.machozo.com
mail.millerfamilydentalcenter.com
mail.montecso.com.co
email.mypos.lk
mail.mysyara.com
mail.mytenantsunion.com
mail.opalonline.ca
mail.operadorasanpiago.com
mail.pcsocials.com
mail.previneeletrica.com.br
mail.proair-hvac.com
mail.proinnovatec.com
mail.proveco.com.mx
webmail.raqibulhuda.com
mail.sagadigits.com
email.sarfuntravels.com
mail.scantranx.com
mail.scprintingint.com
mail.serviciosalternativos.com
webmail.southafricanabalone.co.za
mail.stovall.family
mail.swvachihuahua.com
mail.takfat-fashions.com
mail.tatumbank.com
mail.technologytch.com
mail.trevormillett.com
mail.valientejets.com
mail.yourpartnersolutions.com
mail.zhangyanze.com
mail.zikoramfb.com