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Mailchimp with Astro

A newsletter form is simple until the second submission. The useful setup handles existing contacts, unsubscribed users, merge fields, tags and the confirmation state people see after signing up.

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Mailchimp integrations like this usually take 1–2 days

How the handoff works.

  1. 01

    Submit

    The form posts

  2. 02

    Audience

    Matched against the existing contact

    Key handoff

  3. 03

    Fields

    Merge fields and tags written

  4. 04

    State

    Subscribed, pending or already unsubscribed

  5. 05

    Confirm

    What the visitor sees, and what arrived

Why this is the key handoff

The second submission is where it breaks. A first signup works with almost any setup. What an existing contact, an unsubscribed address or a changed merge field does is the part that decides whether the list stays usable, and it is invisible until somebody submits twice.

Three things that commonly go wrong.

  1. 01

    A native embed and a form of your own have different consent and confirmation setups

    A native embed carries the audience's own confirmation settings. A form posting to the API does whatever it was built to do, so double opt-in and the consent record are configured and then tested rather than assumed either way.

  2. 02

    Field mismatches can cause errors or incomplete records

    Missing or mismatched merge fields can leave contact data incomplete or cause an error, depending on how the audience is configured. I test both the saved contact and the response that came back.

  3. 03

    Audiences are billed and deduplicated separately

    The same person in three audiences is three contacts on the invoice and three chances to be emailed twice. Tags inside one audience are usually what was wanted.

What is included.

  • Site forms adding or updating Mailchimp contacts

  • Merge fields and audience fields set at signup

  • Tags applied at signup, with the fields that support segmentation

  • Audience routing by form or page

  • Double opt-in and confirmation states

Wire up something else?

Reach out and see if we are a good fit.

Get in touch

Currently booking two to four weeks out.