Super User is a question and answer site for computer enthusiasts and power users. It's 100% free, no registration required.

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

How does outlook handle encrypted IMAP-Mails after the certificate/key the mail has been encrypted with expires?

To still read the e-mail, that is encrypted on the IMAP-Server, I would need the original private key for which the mail was encrypted with. But what do I do if the certificate for the key has expired? How do Outlook or other clients handle this?

share|improve this question
up vote 3 down vote accepted

Outlook will warn you with a visual indication that the certificate used to decrypt the message is no longer valid. In the message window, you'll see a red horizontal line right above the body of the message, and in place of the lock icon which normally appears to designate an encrypted message, you'll see a yellow warning icon.

Needless to say, in order for Outlook to decrypt the message, you'll need to have the (expired) certificate installed in your certificate store.

share|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.