Add a line of text into notification email with liquid.

[likeminded]

Hi Team,

I am wanting to add a line into my notificatin email if an item is tagged with preorder.

I have tried 

<tr>
<td>
{% if line.product.tags contains 'preorder' %}
<h2>**This Item is a Pre Order**</h2>
{% endif %}
</td>
</tr>

but doesn't seem to work. can any one shed some light on how I would do this?

[likeminded]

Figured it out...

As a work around I changed the code to this

{% if line.product.vendor contains 'preorder' %}
<h2>**This Item is a Pre Order**</h2>
{% endif %}

And then set a vendor as preorder and applied that to the items I want as pre order.