<?xml version="1.0" encoding="UTF-8"?>
<form>

    <field name="debug" type="yesno" label="Debug" default="0" />

    <field name="debug_email" type="email" label="Debug Email" showon="debug:1" />
    
    <field
        name="mail_id"
        type="sql"
        label="Email"
        query="SELECT id, title FROM #__tfm_mail WHERE published=1 AND mail_type='other'"
        key_field="id"
        value_field="title"
        layout="joomla.form.field.list-fancy-select">
            <option value="0">JNONE</option>
    </field>

    <field name="user_id" type="text" label="User Id" hint="user_id" />
    
</form>