Subscribe Maropost contacts to your lists

A buyer checks out, your automation saves them to Maropost, and then nothing happens: they never get your list campaigns, because the contact was never put on a list.
The enemy is a contact that syncs and still never hears from you.
The Maropost Create / Update Contact step now has Subscribe to lists, which loads the lists from your Maropost account so you pick one by name. The same step sets tags and custom fields: write one field per line as name=value, using variables from earlier steps. A custom field Maropost does not know is skipped, the contact is still saved, and the run log names what was dropped.

Send Email sets its own From email, From name, Reply-to and Subject on each step. Leave one empty and the transactional campaign's value is used. The connection has an API region picker for Maropost accounts hosted in Europe or Canada, checks the API key when you save, and offers three ready-made automations for new customers, new purchases and form entries.
Each step subscribes to one list, so add a second step for a second list. Tags and custom fields have to exist in Maropost first, and a contact on Maropost's Do Not Mail list stays suppressed.
Try it: open Apps, Integrations, connect Maropost, then add a Maropost Create / Update Contact step to an automation and pick a list under Subscribe to lists.
Documentation