PersonalSign S/MIME Certificates

Protect your communication, privacy, and data integrity with flexible certificates to digitally sign and encrypt emails.

Secure/Multipurpose Internet Mail Extensions (S/MIME) is a standard for digital signature and public-key encryption of all kinds of data.

Digital signatures authenticate your identity and prevent tampering. This gives your recipients confidence that the email came from you and that the email’s content has not been altered in transit.

Email encryption keeps sensitive information from falling into the wrong hands. With S/MIME encryption, only the intended recipient can access the contents of your email.

Emails are not as private as you think

Did you know that the emails you send and receive through Gmail or Outlook are easy to read and manipulate? At least to hackers who know what they are doing.

Emails are bounced around through a series of servers and across the internet. Without encryption combined with a means to verify the sender and the integrity of the data, your emails are not secure. This can put you and your company at risk.

Advanced email security and fraud protection

Malicious parties have become increasingly sophisticated at targeting organizations via email.

Their methods include intercepting messages to view sensitive information and email spoofing with the intent of pushing users to phishing sites or triggering malware downloads.

With a PersonalSign S/MIME certificate, you can digitally sign and encrypt emails and ensure only intended recipients can access email content. It’s easy to verify the origin of an email, and you shut out malicious parties.

In essence, total email security.

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End-to-End Encryption (E2EE)

Unlike virtually other “secure email” solutions, email certificates offer real end-to-end encryption.

Security professionals and privacy experts largely agree that end-to-end encryption is superior when protecting your data from hackers and other parties who may want to spy on you.

When you allow the data transmitter – your existing email service provider – to decrypt your messages, you’re leaving a significant potential security hole that could cause problems if the server is compromised.

Secure your emails at any size

We’re ready to help you whether you need one, five, or 100+ PersonalSign S/MIME certificates:

For orders of less than 10 certificates, simply place your order through our Customer Portal.

For orders of more than 10 certificates, we recommend using a Managed ePKI and Certificate Manager platform with significant volume discounts and automation capabilities that enable enterprises to streamline and speed up high volume deployments.

Key benefits

Advanced email security

Highest level of security available for email communication

Leaders in trust

Our PersonalSign S/MIME certificates are trusted by all major email clients

Verified author and origin

Verification of the email origin and author increases trust and weeds out malicious emails

Digitally signed

Signing emails help counter spoofing and phishing attacks

End-to-end encryption (E2EE)

Protect emails at every step of the journey

Choice of algorithms

SHA256RSA or RSASSA-PSS (Managed S/MIME and Certificate Manager users only)

Full compliance

Meet and exceed security requirements and legislation such as GDPR



PersonalSign Express

PersonalSign Business

PersonalSign Department

Recommended for

Personal email Corporate email Corporate email


Ownership of email address Ownership of email address plus identity assurance of individual plus assurance of Organization existence Ownership of email address plus assurance of Organization existence

Certificate validity option

1 or 3 years 1, 2, 3 years 1, 2, 3 years

Identity on certificate

Email address


Email address & named individual

Peter Nielsen

Named department


Management platform

✔️ ✔️ ✔️

Unlimited support

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Issuance time

Within minutes Within minutes* Within minutes*

Zero Touch Deployment option

✔️** ✔️**


Contact us Contact us Contact us

*Requires a Managed S/MIME account
**Requires a Certificate Manager account


Get in touch with us for a non-binding quote

We will contact you as soon as possible.

FAQ Personalsign

  • What is a PersonalSign email certificate?

    A PersonalSign email certificate is a digital security certificate that can be used to encrypt and authenticate the sender of an email.

  • How does a PersonalSign email certificate enhance the security of my emails?

    A PersonalSign email certificate allows you to encrypt your emails, which helps to prevent them from being intercepted and read by unauthorized parties.

  • Can I use a PersonalSign email certificate with any email provider?

    Yes, you can use a PersonalSign email certificate with any email provider that supports the use of digital certificates.