Abstract: Systems and techniques are provided for generating a drop plan for a mailing containing a plurality of mailpieces. Tracking data may be received for mailings sent by a plurality of mailers, and estimated delivery times determined based upon the tracking data. A mailer may specify a delivery goal for a mailing and, based upon the estimated delivery times and the delivery goal, a drop plan for the mailing may be generated, which specifies at least one drop location for at least a portion of the mailing. The mailer also may modify the drop plan, such as by specifying additional constraints, modified attributes of the drop plan, additional or updated goals for the mailing, or the like.