Hi Alexandria 👋
There is an option to change your email notification frequency, and you can find that by clicking on your avatar and going to Settings » Change Notification Email Frequency. See the screenshot here: https://d.pr/i/iPtZoj
As for the kind of emails received, I've always received email notifications only when I'm watching a card or a list, so that whenever there are changes or when a card is due the next day, I'd receive it instantly. That's based on my current settings, so if you set it to send periodically, the email will collect and share your unread notifications.
Related article: https://help.trello.com/article/793-receiving-trello-notifications
If you had to thrive a new habit during a lockdown, what would it be? Trello
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