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- In Thunderbird, compose an e-mail.
- Instead of writing in a normal e-mail, type in the signature you want.
- Click the Save Button on your main toolbar and Save As a file.
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- Save your signatures in a place you'll remember with a name you'll remember. Example:
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- Next, Click Tools>Account Settings. Then click your e-mail address on the left side to bring up the account settings.
- Make sure the Attach this signature check box is checked, then click on the choose button and locate your signature to apply it.
- You're done!