You can select which emails you would like to receive from Blendle in the email settings for your account. Here, you can easily enable and disable different email notifications by (un)checking the boxes as you like.
Going on vacation or need to unplug completely for a while? Just select the "switch off" option for all emails at the bottom of the list. Of course you can always reactivate any or all of the newsletters or notifications when you're back online.