You cannot use logical expressions in depend
(unfortunately neither in if
as one comment suggested)
{{depend X}}...{{/depend}}
output content in between only if variable X is true-ish (note that you cannot use logical expressions
here, just variables or methods on variables.
From this answer, which covers more details of template directives: https://magento.stackexchange.com/a/121510/243
So the only way I see to achieve what you are trying is to add three variables. For example:
in PHP code (probably best in an load_after
observer):
$order->setData('delivery_time_1', $order->getDeliveryTime() == '1');
$order->setData('delivery_time_2', $order->getDeliveryTime() == '2');
$order->setData('delivery_time_3', $order->getDeliveryTime() == '3');
then in the email template:
{{depend order.delivery_time_1}}
Delivery Time: 10am To 2pm
{{/depend}}
{{depend order.delivery_time_2}}
Delivery Time: 2pm To 7pm
{{/depend}}
{{depend order.delivery_time_3}}
Delivery Time: 7pm To 10pm
{{/depend}}