INTEGRATIONS
Sync your FlyCRM contacts with a Mailchimp audience in both directions. This page covers the Mailchimp setup. For the shared ideas — outbound, inbound, unsubscribe actions, and Sync Now — see Email marketing sync.
You need a Mailchimp account and a Mailchimp API key. Mailchimp is a hosted service, so there is no plugin to install. FlyCRM Pro is enough on the FlyCRM side.
FlyCRM reads your Mailchimp lists once the key is in. Your key is stored encrypted, and the settings screen only ever shows its last four characters.

Outbound sync will not run until you pick a list. FlyCRM warns you if the direction is on without one.

New subscribers arrive through a Mailchimp webhook, which FlyCRM registers for you. A scheduled check runs as a fallback, so a missed webhook still gets picked up.
Sync Frequency sets how often the fallback check runs: Real-time (recommended), Hourly, or Daily. Real-time leans on the webhook and reconciles often. Hourly and daily reconcile less.
Set When a subscriber unsubscribes or bounces in Mailchimp to the action FlyCRM should take. The four choices are the same for every email tool.