In MS Outlook/Outlook Express, how to sign e-mails?
Signing Emails is synonymous to putting your own Signing Emails is synonymous to putting your own signature (or maybe a thumbprint or a seal) in a letter. This ensures your recipient, that the message really came from you and that you have put your own mark on the e-mail for the recipient to verify. This also ensures that the message has not been tampered in between the sender and the recipient.
To use a digital certificate to sign e-mails in MS Outlook/Outlook Express:
Create a new E-Mail Message. You can click on the "Digitally Sign" icon on the right side (Figure 6)
Figure 6: Selecting an E-mail Message to have a Digital Signature. Upper Left Side of the Message Panel
You can also set it in the "Security Settings" box in the "Message Options" dialog (Figure 7).
Figure 7: Message Security Properties. Adding a Digital Signature in an Email Message
After you have set an Email Message to contain After you have set an Email Message to contain a Digital Signature, you can continue on creating your message and sending it to the proper recipient(s).
After you have finished writing your Email, you can send it to the recipient just like any other Email. Enter your Card/Token PIN when prompted. If your recipient is also using an MS Outlook/Outlook Express, the Signed Email should look like the one below (Figure 8).
Figure 8: A recipient seeing your Digital Email Signature in an MS Outlook (Red Ribbon on the right side)
When the user clicks the red ribbon icon (See Figure 8 above). A Message Box will appear verifying if the Digital Signature attached to the E-mail is valid (Figure 9).
Figure 9: A validated Digital Email Signature.
If you want to permanently add a Digital Signature to all of the Emails that you send, you just have to go to the MS Outlooks' main menu and navigate to Tools -> Options. The Options Dialog box should appear (see Figure 1 above).
Check "Add digital signature to outgoing messages". This setting will ensure that every email you send will contain your digital signature.