Rather than requiring to make a smart list for every combination of recipients we want to send an email to, it would be easier if it was possible to include an and/or condition when selecting recipients for an email based on their tags. Additionally to be able to select recipients based on tags they do not have rather than solely the tags they do have would be hugely beneficial. For example with both of these features added you would be able to select all recipients who have Tag 1 and do not have Tag 2 etc.