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Thunderbird not syncing Gmail folders properly after August update?

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  • 2 have this problem
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  • Last reply by Corey Lprl

Corey Lprl
Corey Lprl
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Hi all, Since the August 2025 update, I've noticed Thunderbird is no longer syncing some of my Gmail folders (mostly labels I created manually in Gmail). The inbox syncs fine, but custom labels show up empty or don’t appear at all.

Things I’ve tried:

Removing and re-adding the Gmail account using OAuth

Checking Gmail’s IMAP settings — all folders are selected for sync

Rebuilding folder index files in Thunderbird

I didn’t have this issue before the latest Thunderbird update. Is anyone else seeing this? Could it be a bug with label handling or IMAP path prefix?

Any advice would be appreciated!

Hi all, Since the August 2025 update, I've noticed Thunderbird is no longer syncing some of my Gmail folders (mostly labels I created manually in Gmail). The inbox syncs fine, but custom labels show up empty or don’t appear at all. Things I’ve tried: Removing and re-adding the Gmail account using OAuth Checking Gmail’s IMAP settings — all folders are selected for sync Rebuilding folder index files in Thunderbird I didn’t have this issue before the latest Thunderbird update. Is anyone else seeing this? Could it be a bug with label handling or IMAP path prefix? Any advice would be appreciated!

Chosen solution

Matt said
have you checked the folders in Thunderbird? Right click > properties to see, if they are included in a get new mail action?

Thank You.

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All Replies (2)

Matt
Matt
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have you checked the folders in Thunderbird? Right click > properties to see if they are included in a get new mail action?

Helpful?

Corey Lprl
Corey Lprl Question owner
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Chosen Solution

Matt said
have you checked the folders in Thunderbird? Right click > properties to see, if they are included in a get new mail action?

Thank You.

Helpful?

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