Mailto appears to not be working. All that happens is that the icon appears to be pressed, but no action occurs. Shoots out this warning:
<TouchableHighlight onPress={() => Linking.openURL('mailto:mailto@deniseleeyohn.com?subject=abcdefg&body=body')}>
<Icon style={styles.icons} size={SIZE} name='envelope'/>
</TouchableHighlight>
Link not work on Simulator.