If you try to unsubscribe or disable your entire list, and you have more than 1,000 subscribers, you will receive an error saying, You can't unsubscribe that many members at once.
So, how can you remove all your subscribers? The easiest way to replace your subscriber list with another list is to Import A Subscriber File. Just give us the file that contains your new subscribers, then select "Replace Your List With These Subscribers". Your new subscribers will be added, and all the other subscribers on your list will be removed.
What if you want to disable your subscribers to send a test message? There are two ways to send a test message. You can use the composer to send a message to listowners or moderators only, or your can turn on Safe Mode. For more instructions, please see Help for sending test messages.
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