Ecommerce retention lives and dies by list quality. Order exports, marketplace reports, support-ticket threads, and abandoned-cart logs all hold customer addresses, but they arrive full of duplicates, typos, and role addresses like support@ that should never receive a promo. A dirty list tanks deliverability right before a big sale.
This workflow shows how to consolidate customer addresses from every channel, strip out role and disposable addresses, dedupe repeat buyers, and export a clean list your email platform will actually deliver.
