The "Detailed Send Log" is available for all communications sent from the "Communications" section in the Admin Control Panel. In here, you'll see a history of all email addresses that received a blast email, phone numbers that received text messages, and mailing addresses that letters were sent to, along with other reporting statistics. The "Detailed Send Log" is always available for you to reference back to at any time.
How to access the log
In order to view the log, you'll need to first visit the "Communications" section in the Admin Control Panel. Next, find the communication you'd like to view the details of and click on the blue magnifying glass under the "Details" column.
To view the log, scroll down to the section labeled "Detailed Send Log." In here, you'll be able to see who the communication was sent to, as well as additional reporting information.