What order are broadcasts or blasts sent in?

Default Behavior: Randomized Order

If no explicit send order is defined (for example, using send by time zone or custom score), the recipient list order is randomized by default for each broadcast.

For example, if you set up an automatic pause for the first 10k recipients, we will choose a random 10k from your audience.

Avoiding Duplicate Sends to the Same Recipients

While contacts are randomized each time, if you're sending that same audience daily with the same automatic pause, you may have overlap in the 10k sample each day. To avoid sending messages to the same phones or emails, consider adding a suppression that removes those that have recently received messages.