Looking for help with your list?
Mailchimp lists are now called audiences. They include the same data and functionality as before, along with valuable new insights about your contacts. As we introduce this change over time, you’ll notice fewer places where we still say list. Learn more about this change.
When a large number of contacts or new email addresses are imported to a list, we review them through our abuse-prevention system to ensure that the list can maintain its reputation over time.
The first campaign you send to this newly updated list will send slowly so that our system has time to verify the imported addresses. This process doesn't affect existing, already-verified subscribers.
Verification is a well-oiled machine, so even new subscribers will receive emails in a reasonable time frame.
In the event that an imported list cannot be verified, we'll cancel the remaining sends to the newly-imported subscribers and we may ask that you undo your list import.
Imported contacts do not receive a welcome email.