This is another one in the ‘Things to remember’ category.

For some reason, by default, Thunderbird does not use the ‘Reply-to’ header in emails. This headers tells mail software what address that replies should be sent to. It’s commonly used for mailing lists so that replies are sent to another address, such as the the mailing list itself, instead of the address that sent the message.

To change the default Thunderbird behavior, you have to tweak a setting.

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