when I use the email program and create a smart list from it, sometimes I'll get an estimated audience of 0. The smart list should be pull back roughly ~500k members. I already checked the logic and it's correct, sometimes if I reload the page it'll show the correct audience size. I suspect it's due to the high volume of members.
My question is, is there a better way to send emails to a high volume list? also when the email program shows estimated audience as 0, will it still work? or do I need to reload to get it to show the actual number before scheduling the send?