Configure your email notificationsGo to your profile page by clicking on your avatar and click the 'Edit profile' button or directly click the 'Settings' option in your profile drop down. Navigate to the 'Settings' tab in which you will find the following email notifications options:
Add topic to subscriptions which you reply to
If you reply on a topic it will be added to your subscriptions. You can find your topic subscriptions in your profile drop down > 'Settings'.
Receive email notifications from your topic subscriptions
This will send an email when there is a new reply in a topic that you are subscribed to. If you open the email and visit the topic you will continue receiving emails for new replies. If you ignore this email you will no longer receive emails for new replies on this topic.
Receive email notifications when a best answer is marked in your subscribed topics
This will send an email when a topic that you are subscribed to receives a best answer.
Receive email notifications for new topics in your subscribed categories
This will send an email every time there is a new topic posted in a category that you are subscribed to. Set this setting to NO works as a kill switch: you won't receive any emails for new topics anymore, even if you are still subscribed to individual categories.
Receive email notifications from @mentions
This will send an email every time somebody @mentions you in a topic or reply.
Receive email notifications for new private messages
Set to Yes, and you will receive an email every time somebody sends you a private message.