Assuming that there would be at least one element that matches the xpath of '//*[@id="emailwrapper"]/div/div/table', you can simply do:
driver.find_elements_by_xpath('//*[@id="emailwrapper"]/div/div/table')
It will return a list, or raise NoSuchElementException if none are found.
Exact same results but written differently:
from selenium.webdriver.common.by import By
driver.find_elements(By.XPATH, '//*[@id="emailwrapper"]/div/div/table')
After which you can do a len() on the list for how many elements
