Tonight we have released a new feature called the "Inbox Shadow", which allows you to filter out recipients from an email campaign that have received a previous email campaign from you in a designated number of past days.
1. You wish to send an email campaign, but make sure you do not send to anyone that has received a campaign in the last 30 days.
2. You may want to schedule a daily recurring email campaign to go out to a Group, but upon each daily send, have those recipients that have received any email campaign in the last 7 days filtered out.
To use this feature, simply set the proper field on the "Send Email" page:
You can also set a recurring schedule for an email by filling out the Recurring Scheduling section: