86/100 SECURITY SCORE

Certificate Information

Subject
CN=mail.popov.org.uk
Issuer
C=US, O=Let's Encrypt, CN=R12
Valid From
January 08, 2026
Valid Until
April 08, 2026 65 days
Public Key
RSA 2048 bit Adequate
Signature Algorithm
SHA256-RSA
SHA-256 Fingerprint
93:CA:73:53:5E:7E:35:5E:94:AD:BF:44:8B:7C:22:93:C9:A5:DB:F2:BA:58:D7:21:D7:39:F8:0E:09:71:D1:0B
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
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

81 domains
webmail.ofeli.com.br

Other domains in certificate

mail.aapkir.com
mail.ac9vi.com
mail.adaclub.ae
mail.alawaelksa.com
mail.almegasports.com
mail.alubat972.com
mail.amasco.net
webmail.aojieoptics.com
mail.bitswapper.com
mymail.bmhomoeopathy.com
mail.caldeira.cloud
mail.casamerchants.com
mail.centralhn.com
mail.cjrevents.com
mail.uvs.co.in
mail.electriservicio.com.uy
login.cpaditivos.com.pe
mail.ctlcomercio.com.br
mail.d3sconocidos.com
mail.dbdglobal.org
mail.deltaexpo.org
mail.digitalarm.agency
mail.dudekdesign.com
mail.erfp.co.uk
mail.exataengenharia.net
mail.expert-creators.com
mail.ezshifa.com
mail.hkrause.com
webmail.huonlawyers.com
mail.infinidim.enterprises
mail.itfinden.com
mail.jansson.it
mail.johnantoine.dev
mail.kula.nz
mail.l10n-pro.com
correo.larkenltda.com
omail.ldgroup.ma
mail.lizfashion.com
mail.manasystems.net
mail.marissahotel.com
mail.mcnally.xyz
email.medicalmex.com
mail.mekong-logistics.com
mail.messha.org
mail.minto.finance
mail.mitchellwilson.com
webmail.mmcholding.org
mail.no-q.ca
mail.nrgnetworks.com
getmail.papublishing.com
mail.pathtoprosoccer.com
private.penniemail.com
mail.perfumarie.com
webmail.petree.ws
mail.pinestatetech.com
mail.popov.org.uk
mail.poradek.cz
mail.pousadalitoreza.com.br
mail.prohealthcalhoun.com
email.qalegalvideo.com
mail.quantum-laboratories.com
mail.radishplan.com
mail.regex.global
mail.ryanjose.com
mail.sasiris.com
mail.sbsconsulting.com
webmail.sealtechsupply.com
mail.skypamltd.com
mail.skytekservice.com
mail.tamaoki.jp
mail.teltech.net
mail.theallreds.net
mail.thecubehouse.com
mail.timtopolewski.com
mail.triofi.in
mail.tt-sun.com
mail.twprotech.com
mail.vh7.ca
mail.visda.ca
mail.wave-mobile.com