Secure Email Certificates
Encrypt and digitally sign your emails with S/MIME certificates. Protect personal & business email from phishing.
From $8.99/year
256-bit TLS
Trusted CAs • 99.9% browser support
3 Steps to Secure Email
Get started in under 5 minutes
Order Certificate
Choose Individual or Business S/MIME and complete your order.
Validate & Receive
Verify your email address and receive your certificate instantly.
Install & Send
Install in Outlook, Thunderbird, or Apple Mail and start sending secure email.
Individual vs Business — Which Do You Need?
Choose the right S/MIME certificate for your needs.
Choose Your S/MIME Certificate
Both certificates include email encryption, digital signatures, and universal email client support.
Personal email encryption & signing
- Email encryption & digital signing
- Single email address validation
- Identity verification
- Outlook, Thunderbird, Apple Mail
- Instant activation
- Free reissues included
Company-verified email security
- Organization data validation
- Company name in certificate
- GDPR compliant data encryption
- Enhanced trust indicators
- All business email systems
- Priority business support
Why Choose S/MIME?
The gold standard for email encryption trusted by enterprises, governments, and professionals.
Email Encryption
End-to-end email encryption for sensitive information.
Digital Signatures
Verify sender identity and ensure email integrity.
Prevent Tampering
Detect unauthorized changes to email content.
Universal Support
Works with all major email clients.
Regulatory Compliance
Meet industry standards with S/MIME encryption
HIPAA Compliance
Protect patient information in email communications
SOX Compliance
Secure financial communications and audit trails
GDPR Protection
Protect personal data in email communications
Why Professionals Choose S/MIME
Trusted certificate authorities, strong encryption, and expert support for secure business email.
Trusted Certificate Authorities
Issued by globally recognised CAs, trusted across all major browsers, devices and email clients.
Encryption & Digital Signatures
End-to-end S/MIME encryption and digital signing verify sender identity and protect message integrity.
Warranty & 24/7 Support
Every certificate includes warranty protection and free expert support, around the clock.
Secure Your Email Communications Today
Join thousands of professionals who trust S/MIME for secure, encrypted email.
30-day money-back guarantee · Instant delivery · 24/7 support
Frequently Asked Questions
Answers to common questions about certificates and our services.
What is S/MIME and how does it work?
S/MIME (Secure/Multipurpose Internet Mail Extensions) is a standard for public key encryption and signing of MIME data. It encrypts email content and provides digital signatures to verify sender identity and message integrity.
Which email clients support S/MIME?
S/MIME is supported by all major email clients including Microsoft Outlook, Apple Mail, Thunderbird, iOS Mail, Android Gmail, and most enterprise email systems.
Do both sender and recipient need S/MIME certificates?
For digital signatures, only the sender needs a certificate. For encryption, you need the recipient's public key (certificate). Most enterprise deployments provide certificates to all users.
Is S/MIME suitable for HIPAA compliance?
Yes, S/MIME encryption helps meet HIPAA requirements for protecting electronic health information in email communications, when properly implemented with other security measures.
Can I use S/MIME with cloud email services?
Yes, S/MIME works with cloud services like Microsoft 365, Google Workspace, and others. The encryption/decryption happens at the client level, not on the server.
What happens if I lose my certificate?
We provide certificate backup and recovery options. Enterprise plans include centralized certificate management to prevent data loss and ensure business continuity.