Batch Email Recipients in SmartList

[Anonymous]

Hi:

I am sending out a batch email. In my database, I have a field called "Customer Group."  There are several types of customers designated by a single alphabetic character. Up until now, I only send emails to 1 customer group. I now want to send a communication to multiple groups. I have Customer Group set up as a filter in my SmartList. If I set it to just 1 Customer Group, everything works fine, but if I add multiple groups (multiple letters in this case) it tells me that there are no recipients when I go to Flow. 

Question: How do I specify multiple customer groups in my Customer Group filter?  I have tried simple delineators but none seem to work.

Thanks. 

[Anonymous]

When you are building the smart list, there should be a green '+' to the right of the filter. That's how you'd add more filter values.

[Anonymous]

Nope.  I thought the same thing, but there is no Green + sign on the filter... There are on my other 2 filters just not on thos one ????