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Webform can send e-mails to different recipients based on the value of a select list, radio buttons, or checkboxes. To set up a conditional recipient:

Click the "Webform" tab on the node to list the components in the form
Enter name of field, e.g. "Kind of inquiry"
Choose "Select options" as the type of component.
Click "Add".
The "Edit component" screen appears.
Enter a Label and Field key e.g. "Kind of inquiry", "kind_inquiry"
In the field "Options" add a list of values.
Enter a list of values as you would normally, such as:
general|General information
sales|Sales question
technical|Technical question
Save your changes.
After the component has been set up, you now need to configure the e-mail.

Under the "Webform" tab, click the sub-tab for "E-mails".
Choose the component you set up to be the recipient and click "Add".
You may choose a separate recipient for each option as part of the configuration.