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Why does thunderbird not Confirm Security Exception anymore

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  • Last reply by doug.pearson
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My e-mail provider has done the annual update of security and provided a new e-mail cert; however, Thunderbird no longer successfully updates it.

Thunderbid gets to the point of confirming the security exception; however, does not proceed.

This is using ThunderBird 140.4.0esr (64-bit) from Ubuntu Snap, on Ubuntu LTS 24.04.3.

My e-mail provider has done the annual update of security and provided a new e-mail cert; however, Thunderbird no longer successfully updates it. Thunderbid gets to the point of confirming the security exception; however, does not proceed. This is using ThunderBird 140.4.0esr (64-bit) from Ubuntu Snap, on Ubuntu LTS 24.04.3.
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Chosen solution

I checked the certificates and found the newer certificate has a smaller scope than the old one, so the connection needed to be updated. So the Thunderbird response was to timeout, while that is one way to handle errors, passing the actual transaction error would have resolved this much quicker.

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All Replies (2)

Hi Doug!

This could be the issue: https://bugzilla.mozilla.org/show_bug.cgi?id=1693244 And based on this, it seems to be a snap related Thunderbird bug to me: https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1904789

Maybe the workaround in the Bugzilla ticket can help you. If not, I'm not exactly sure what to do to fix this, other than trying the "Mozilla Team" PPA or the flatpak version.

Regards, Balázs

Chosen Solution

I checked the certificates and found the newer certificate has a smaller scope than the old one, so the connection needed to be updated. So the Thunderbird response was to timeout, while that is one way to handle errors, passing the actual transaction error would have resolved this much quicker.

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