Each community member can decide on when and what type of email notifications he/she wants to receive from the community. To manage the email notification frequency, you should click on your profile picture> Account Settings> Emails & Notifications
Here, you would see different email frequency options for each type of notification. For example, you can choose to receive immediate notifications if there is a new activity from people I'm following, or Never receive an email notification when there are an up-vote and likes on my posts, or receive only one email notification for all the likes I have received in a day as a daily digest.
Please remember to save the changes at the end.