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how to include bcc function in thunderbird mail?

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I want to send e-mails to multiple recipients without revealing their e-mail addresses to each other. How can I do that with Thunderbird mail?

I want to send e-mails to multiple recipients without revealing their e-mail addresses to each other. How can I do that with Thunderbird mail?

Chosen solution

Click on the button beside the address field that says TO and select BCC instead.

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Chosen Solution

Click on the button beside the address field that says TO and select BCC instead.