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Is there any way to include multiple email addresses on the same CC (or To) line in Thunderbird?

It looks like for every recipient I have to start a new CC field below, which can be very tedious and take quite a bit of screen real state.

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Separating addresses with a semicolon seems to work.

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Really? Not for me. Addresses don't autocomplete and the email address is shown in red (as when I type an email address that is not valid) – Amelio Vazquez-Reina Jun 17 '13 at 23:54
Really. Though I only tried it for "To" since I don't propose to spam people with testing this. – pnuts Jun 17 '13 at 23:57

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