Clean, Split & Maintain Contact Lists
Use list maintenance actions without confusing audience structure with contact data.
List actions
- Copy
- Creates a separate list based on the selected list.
- Split
- Distributes contacts into the requested number of lists.
- Clean
- Applies selected hygiene rules to the list.
- Empty
- Removes the contacts from the list while retaining the list configuration.
- Bulk Update
- Updates matching recipients globally or in selected lists from entered or imported email addresses.
Empty and bulk-update can affect many contacts
Export a backup first and confirm the selected list scope before running either action.
Why regular list maintenance matters
A contact list degrades continuously even if you never add a new subscriber: people change addresses, stop opening mail, or mark messages as spam without ever unsubscribing. Left unattended, this slowly drags down open rates, click rates, and sender reputation, since inbox providers weigh engagement history heavily when deciding where your next campaign lands.
Treat list maintenance as a recurring task rather than a one-time cleanup. Copying, splitting, cleaning, and bulk-updating lists on a regular schedule keeps your audience structure accurate and keeps segments and automations built on top of that data working the way you expect.
Building a maintenance schedule
Pair list cleaning with email verification so hygiene rules and address-level verification reinforce each other rather than working against outdated data. After a clean or bulk update, check any segments or automations that reference the affected list, since a large change in list membership can shift who qualifies for a segment or trigger.
Before running Empty or Bulk Update on a large list, export a backup and confirm the scope, since both actions can affect a large number of contacts at once and are not easily undone. A predictable monthly or quarterly maintenance pass is usually enough to keep an active list healthy without disrupting day-to-day sending.
Frequently asked questions
- What is the difference between Clean and Empty?
- Clean applies selected hygiene rules to remove problem contacts, while Empty removes all contacts but keeps the list configuration.
- Is Bulk Update reversible?
- No, which is why exporting a backup before running it on a large list is strongly recommended.
- Does Split preserve custom field data?
- Yes, contacts keep their existing custom field values when distributed into the requested number of lists.
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