Update a subscriber in Mailchimp when an email bounces in Postmark

What each client fills in

Mailchimp: Audience ID

For example Audience → Settings → Audience name and defaults

Postmark: Message stream

The stream the emails go out on: “outbound” unless the server has others.

The accounts it needs

Each is the client’s own, stored encrypted and never copied between clients. Until one is added the client’s checklist shows it, and nothing runs.

• 

  Postmark → the client’s server → API Tokens → copy the Server API token. The From address must be a confirmed sender signature or on a verified domain.

• 

  In the client’s Mailchimp: Profile → Extras → API keys → Create A Key. The server prefix is the part after the dash (us21).

After you install it

It lands switched off. The client’s checklist holds exactly this:

1. Connect the client’s Postmark, for “An email bounces”
2. Connect the client’s Mailchimp, for “Update a subscriber”
3. Fill in Postmark: Message stream (The stream the emails go out on: “outbound” unless the server has others)
4. Fill in Mailchimp: Audience ID (For example Audience → Settings → Audience name and defaults)