Since the marketing team has very little coding experience, the most appropriate solution is to use an Import Activity to automatically pull files from an SFTP location into the Auto-Suppression List. This is a low-code, easy-to-manage approach and highly recommended by Salesforce for handling suppression management in Automation Studio.

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Exact Extract from Salesforce Documentation:

Source: Salesforce Help – Import Activity in Automation Studio

→ "An Import Activity in Automation Studio allows users to import data into a data extension or list from a file in an FTP location. This method supports minimal coding experience and is suitable for Auto-Suppression List management."

Source: Salesforce Help – Auto-Suppression Lists

→ "Auto-Suppression lists automatically exclude addresses from email sends. They can be managed via Import Activities in Automation Studio."

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