Hello @MarkC3348 ,
We're sorry to hear you're having issues narrowing your sendouts by tag. Our engineers are looking into a fix for accounts with over 10k contacts not having the ability to limit by tag. In the meantime, they suggest using Segments based on those tags and list selections, which can be selected in the Scheduling screen.
Hi William,
Thanks but having to create segments and sending one at a time to segments is not practical.