Thunderbird: be able to write a remark on a received e-mail before archiving it.

[Jean-Michel]

I would like to put a remark on a received e-mail e.g. a membership bill where I would like for example to write "membership fee paid on August 1, 2026" before archiving it. In this way I would always know that I have done the required action.

[kelimuttu]

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