Abstract: A communications system may include a plurality of source message servers for storing messages for delivery to a user, a target message server having a target message box associated therewith, and an aggregation server for periodically aggregating the messages from the source message servers to the target message box for retrieval by the user. The target message server may provide a delivery failure message to the aggregation server based upon a failure to deliver a message to the target message box. As such, the aggregation server may increase a period of sending messages to the target message box based upon a delivery failure message therefrom, and thereafter decrease the period of sending messages to the target message box based upon a successful delivery of a message thereto.

Abstract: A communications system may include at least one destination server for hosting email message boxes, and communications devices for generating email messages each associated with a respective message box. A delivery server may have a plurality of queues and a controller. The controller may store the email messages in a first queue, and attempt to send the stored email messages to the destination server at a first sending rate. The controller may also move email messages stored in the first queue to a second queue based upon a delivery failure. Email messages may be sent from the second queue at a second sending rate less than the first sending rate. The controller may also move email messages from the second queue to the first queue having a common characteristic with a successfully delivered email message.

Abstract: A communications system may include a plurality of account databases each for storing information associated with different accounts, and a central database for storing location information associating each account with a respective account database. Additionally, the system may also include at least one communications device for accessing account information, and an interface device for receiving an account access request from the at least one communications device for a desired account. Moreover, the interface device may also be for retrieving account location information from the central database for the desired account, and interfacing the at least one communications device with the respective account database associated with the desired account based thereon.

Abstract: A communications system may include a plurality of source message servers for storing messages for delivery to a user, a target message server having a target message box associated therewith, and an aggregation server for periodically aggregating the messages from the source message servers to the target message box for retrieval by the user. The target message server may provide a delivery failure message to the aggregation server based upon a failure to deliver a message to the target message box. As such, the aggregation server may increase a period of sending messages to the target message box based upon a delivery failure message therefrom, and thereafter decrease the period of sending messages to the target message box based upon a successful delivery of a message thereto.