Starting July 10, 2025, DigiCert stopped issuance of this product. You must request a Secure Email Certificate instead.
DigiCert Client Premium (SMIME) certificates
Protect your email from hacking, interception or unauthorised reading of your messages; allows you to encrypt messages and digitally sign them.
As low as
£150.96 / year
*
- Client authentication
- Email encryption
- Email signing
- Document signing (with programs that support digital signatures. For programs that use the Adobe Approved Trust List, please use a Document Signing product)
- Supported by major browsers and mail clients
Why do I need
Digicert Client Premium Certificate?To protect emails and sign documents.



- Contains employee data
- Contains company data
LeaderTelecom DigiCert Client Premium (SMIME) Certificates prices
Sale until October, 31
DigiCert Client Premium (SMIME)
Issuance from 1 day,
with Organisation Validation (OV)
Optimally value of price and quality
Verifies your organisation (OV)
Verifies your name and surname
Free Reissuance
Free shipping via email
If you need a certificate for mail server
protection, you'll need another certificate:
- — If you use MS Exchange — UCC
- — If you use another server — PositiveSSL
We work without prepayment! Test 2 weeks for free!
Place an order and get free of charge
Support
We provide clients with quick, friendly and professional support via email and phone
Free unlimited reissuance
Free unlimited reissuance of the certificates when the private key is lost
Getting an SSL certificate from LeaderSSL is as easy as 1-2-3
(no payment needed)