Showing previews when new mail arrives

[BAG]

A new update, and a feature vanishes: It no longer shows sender and subject when new mail arrives.

[Agentvirtuel]

Hello

https://www.thunderbird.net/en-US/thunderbird/128.0esr/releasenotes

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Thunderbird now uses native Windows notifications

Take a look at https://forums.mozillazine.org/viewtopic.php?t=3123643