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How do I password protect an email?

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I'm sending an email only to certain people that have the password to open it, but I need to apply the password to the email so that only those people can open it and read it. I thought I was supposed to go to Tools, then Options, then Security to set the password, but I don't find that option any more. I've done it more than once before. It doesn't seem to be available now.

I'm sending an email only to certain people that have the password to open it, but I need to apply the password to the email so that only those people can open it and read it. I thought I was supposed to go to Tools, then Options, then Security to set the password, but I don't find that option any more. I've done it more than once before. It doesn't seem to be available now.

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Firefox doesn't do email, it's a web browser.

If you are using Firefox to access web mail, you need to seek support from your service provider or a forum for that service.

If your problem is with Thunderbird, see this forum for support. http://www.mozillamessaging.com/en-US/support/ or this one http://forums.mozillazine.org/viewforum.php?f=39