How do I add a signature to all my outgoing emails?
You can add signature to all your outgoing emails by following the steps given below:
To customize signature
Click Setup > Personal Settings > Account Information.
In the Account Information page, click Edit for the Signature section
Specify the signature in the HTML editor.
Click Save.
Note: If you have defined your signature, then it will be available in all the emails that you send. On the other hand, in email templates, you need to select the signature option to use it in the templates.
To use signature in email templates
Click Setup > Templates > Email Templates.
In the Email Templates page, select the email template from the list and click Edit.
In the Edit Email Template page, select the Add User Signature check box.
Click Save.