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Mail from me: "unable to verify message signature"

300 Views 1 Reply Latest reply: Dec 8, 2013 8:23 PM by redesigned RSS
Buadhai Level 1 Level 1 (0 points)
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Mar 25, 2013 12:49 AM

Starting today (right after the 10.8.3) update, people receiving mail from me get the message "unable to verify message signature". If I send mail using Mail.app to myself I get the same message. If I click on "Show Details" it shows that Mail.app is using a self-signed certificate that I created for use with Postfix.

 

In Mail.app's Preferences, I have iCloud set up to use an Apple TLS certificate.

 

Why is it suddenly using a self-signed certificate?

 

How does Mail.app even know about this certificate? ( /private/etc/postfix/certs/cacert.pem)

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