Symptoms
Returning multiple values from a SmartObject does not space them out in an email.
Diagnoses
It's possible to split these values up with a Join() Inline Function.
Resolution
Put a Join() Inline Function in the email. In the String[] input place your SmartObject String field, selecting 'All Items' at the end of the wizard. For the delimiter, type
to add a line break. This will split all the return values up with line breaks in the email.