Importing and Using your Email or Personal Authentication certificate with Eudora (PC)

Importing your Certificate into Eudora:

The Eudora mail client itself does not manage personal authentication certificates but uses the Windows certificate store instead.

To import your certificate into Windows:

  1. Click Start > Control Panel > Internet Options

  2. Select the 'Content' tab and then click the 'Certificates' button.

  3. In the 'Certificates interface', make sure the 'Personal' tab is selected, click 'Import' and then click 'Next'.

  4. Click 'Browse' in the next step and navigate to the location of your PKCS12 certificate file.

  5. Now you need to change type of the file, select 'Personal Information Exchange (.p12)' from the drop down box, locate your certificate file (.p12) and click 'Open' (see below).

  6. Click Next. To complete the installation process, you are required to enter the PIN (password) you set up for the certificate during the enrollment process. If you have forgotten your password, contact your system administrator who will be able to reset it for you.

  7. Click Next. You will be prompted to choose the certificate store for your certificate. Unless your administrator has specified otherwise, you should leave this at the default Place all certificates in the following store option.

  8. Click 'Next' to proceed to the the last step - completing the Certificate Import Wizard.

  9. Review your settings and click Finish to import your certificate.

  10. Select the security level for storing your private key and click OK.

That's it. You have successfully imported your Comodo Personal Authentication certificate into Windows. You can now sign and encrypt mails in Eudora by following the guidance in the next section.

Signing and Encrypting Mails

  • Signing an email ensures the recipient knows the email has come from you and informs them that it has not been modified in transit.

  • Encrypting an email ensures that only the recipient can read the email content and attachments.

Note 1: In order to encrypt mail, you must first have your recipient's email certificate in your certificate store. To obtain their certificate, you need to get your contact to send you a signed email. Upon receipt of the signed mail, their certificate will be automatically imported into your certificate store and you will be able to sign/encrypt mail to that person.

Note 2: To sign and /or encrypt mails, the Eudora S/MIME plug-in must be installed. If it isn't already installed, download it from and copy the SMIME.dll file to the Eudora 'Plugins' folder (typically C:\Program Files\Qualcomm\Eudora\plugins).

Restart Eudora and verify installation by selecting Special > Message Plug-ins Settings...

To sign your mail:

  1. Compose your email and attach files as usual.

  2. Click S/MIME Signer from the tool bar.

  3. Click 'Send'.

  4. Click OK in the protected item access request dialog.

Note: If you have multiple signing certificates, then you have to choose one from the dialog box and click OK.

To encrypt your mail:

  1. Compose your email and attach files as usual.

  2. Click S/MIME Encrypter from the tool bar.

  3. Click 'Send'.

Contact us for consultation on your security needs

Contact us for consultation on your security needs.

Contact an expert