Hi guys. I made a video tutorial quite a while ago showing how to retrieve a free Comodo e-mail certificate from here using Internet Explorer, and then import it into the free e-mail client, Thunderbird.
My free Comodo e-mail certificate recently expired. So I followed my video tutorial exactly as I did a year or so ago, and got this error:
Sending of message failed. Unable to sign message. Please check that the certificates specified in Mail & Newsgroups Account Settings for this mail account are valid and trusted.
So after fixing the problem, I decided it might be usefull for others if I posted my fix here. So here goes…
- Once you’ve retrieved your free e-mail certificate from Comodo, open Internet Explorer.
- Go Tools>Internet Options>‘Content’ tab>Certificates.
- Select your new certificate from the ‘Personal’ tab.
- Click ‘View’.
- Select the ‘Certificate Path’ tab.
- You will now see the tree of linked certificates which are required. Export each certificate and import them into Thunderbird (some may already be in Thunderbird): View each certificate, select the ‘Details’ tab, then ‘Copy to file’.
And that’s it!
Happy Security! Happy Privacy! Happy Christmas! And a Happy New Year! ;D :-TU