Mailchimp is a web-based broadcast email application, on this platform you can create campaigns which can later be sent to your existing customers.
Currently DealPOS has been integrated with Mailchimp so you don't need to input customers from dealpos to Mailchimp manually, because all of that can be done automatically.
Before integrating DealPOS with MailChimp, we need to enter the Token, List ID and Prefix to mailchimp.dealpos.app
Step 1. Get the Prefix in MailChimp Link

Step 2. Copy API Key in Token Column

Notes :
To get the API you can see this article - Get The MailChimp API Token
Step 3. Go to Audience, Select All contact, Choose Settings
Select Audience and Default, after that copy the list id to DealPOS Mailchimp


Step 4. Go to Configure - Paste Token, List ID and Prefix, then Click Save

Step 5. Contact was Synchronized Successfully

Step 6. Recheck on Mailchimp List

People also read these articles :
To Get MailChimp API Token : Get The MailChimp API Token
To Upload DealPOS Contact to MailChimp : Upload Contact from DealPOS to MailChimp
To Sync DealPOS Inventory to Shopify : Sync Inventory DealPOS to Shopify