Filter your send based on whether or not contacts have consented in accordance with the GDPR legislation
In order to send to your GDPR consented contacts, you're able to search for these contacts specifically during the sending process.
In the 'Messages' section on the left side, choose the message you're planning to send then click the paper plan icon on the right hand side of the message.
Now click 'select contacts'
Choose 'Advanced selection' and then click 'next' in the lower right corner.
You can now change the search criteria to the below, to target consented contacts :