Agencies inherit client data in whatever state the client kept it: a CRM export here, a spreadsheet of event leads there, a decade-old newsletter list nobody has touched. Before running a campaign on a client's behalf, the agency has to turn that inheritance into a clean, segmented, deliverable list - often for several clients at once.
This workflow standardizes how agencies process incoming client lists: extract addresses from every format, drop role and disposable addresses that would embarrass the client, dedupe, and export tidy per-client CSVs.