Send an email in Postmark when someone joins the mailing list in Mailchimp

What each client fills in

Postmark: From

For example Northside Plumbing <hello@northside.example>

Who it goes to (Postmark)

The address that gets it: yours, or the client’s team.

Mailchimp: Audience ID

Audience → Settings → Audience name and defaults: the Audience ID.

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.

• 

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

• 

  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.

After you install it

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

1. Connect the client’s Mailchimp, for “Someone joins the mailing list”
2. Connect the client’s Postmark, for “Send an email”
3. Fill in Mailchimp: Audience ID (Audience → Settings → Audience name and defaults: the Audience ID)
4. Fill in Postmark: From (For example Northside Plumbing <hello@northside.example>)
5. Fill in Who it goes to (Postmark) (The address that gets it: yours, or the client’s team)