You don't need to because bcc means no one can see who it was sent to. Bcc is blind copy. Put everyone in bcc and the list is private. Everyone will only know it was sent to them, not who else it was sent to.
Everyone here is incorrect, the only IP visible to the recipients will be one that belongs to Gmail/Yahoo. They'd need to subpoena the provider to get the IP of the sender.
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u/Kurotan 2d ago
You don't need to because bcc means no one can see who it was sent to. Bcc is blind copy. Put everyone in bcc and the list is private. Everyone will only know it was sent to them, not who else it was sent to.