The second email drop will send to the people that didn’t open the email in the first drop.

• For example if names are imported that would be added to the first list between the first and second drop they will not be emailed.
• If the original list is modified to include more contacts, the contacts will not be emailed
• If you add an additional list to the project after the first drop, only the original contacts that did not open the email will be send the second message.

Bottom line the second email function is designed to send emails to the contacts from the first drop minus anyone that opened the first message.