You can send targeted email newsletters using Mailchimp on Makerble
Steps
Press the envelope button in your top menu
You arrive in the Messaging App
Select with Contacts
Select Broadcasts
You arrive on the Manage Broadcasts page
Press New Broadcast
In the Choose a format dropdown menu, select Mailchimp
Press Filter Contacts to start defining your target audience for this communication
The Filter Contacts overlay appears on the right side
Choose the criteria you want to use
Press Apply
The list of contacts on the left side will update
Press Select All to confirm the contacts you want to include in this communication
On the right side, name your Makerble Mailchimp Tag and press Save in Mailchimp
You can now go to Mailchimp and see that this Tag has been added to the selected contacts