How do I schedule different Leads to send emails on different date ?
When you want to schedule emails to go on pre-determined date for individual leads so that all leads won't be scheduled on single day.
Why some leads are automatically Deactivated after adding or uploading ?
Assistant validates the email address, if the Email address is not valid then the lead is marked Deactivated->Invalid Email.
If the sent email bounces back, then the lead is marked as Deactivated.
On the Lead List page, one could filter by the State as Deactivated and the possible SubState for Deactivated.