I haven't tried this myself yet, but it looks like you can set up a custom schedule. When you're in a View or Workbook look for the Subscribe icon...
.... and then select the schedule.
It does note here though that for Tableau Server, it's version 2018.2 that has the custom schedules enabled (this version was released end of July this year)
Hope this helps
[Program Manager - Tableau Community]
If you use TABCMD and Windows Task Scheduler then you don't need to create a Schedule. Also there's the fact that users cannot create them anyway as it's an admin task for versions less than 2018.2.
You didn't say way you're trying to email. Can you please provide more details; we always always always need details