Account Colors

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由 turbodent 发表于 Jan. 29, 2021 · 永久链接

I used to LOVE this when it worked, thanks to the author for all these good years... :)
For those interested in a similar solution, you may want to look into BorderColors D
https://addons.thunderbird.net/en-GB/thunderbird/addon/bordercolors-d/?src=search