Abstract: A system, apparatus, and methods are provided for conditionally forwarding electronic messages. Users of an online application or service are provided internal addresses (e.g., electronic mail addresses) within a domain (e.g., an Internet domain) of the application or service. When a message is received that is addressed to a user's internal address, it is queued for conditional forwarding to an external address of the user (e.g., an electronic mail address in a domain other than the domain of the application or service). After a threshold period of time lapses, if the message was not read via the online system (e.g., via web or mobile client software) it is forwarded to the external address. If additional messages were received for the same conversation or thread, they may be forwarded at the same time. Messages may be forwarded in their original form; multiple messages may be forwarded in digest form.

Abstract: A system, method, and processor readable medium containing code for causing a processor to synchronize a secondary database system, such as one stored on a palmtop electronic device, with a distributed database system, comprising a main database and at least one replica database. The system further comprises a modification module that contains entries for modifications that have been made to the secondary database since a previous synchronization between the secondary database and the distributed database system and a synchronization module that synchronizes the secondary database with one of the databases of the distributed database system using the modification module. Each database in the distributed database system stores an identification mapping database having an assigned version number.

Abstract: A system, method, and processor readable medium containing code for causing a processor to synchronize a secondary database system, such as one stored on a palmtop electronic device, with a distributed database system, comprising a main database and at least one replica database. The system further comprises a modification module that contains entries for modifications that have been made to the secondary database since a previous synchronization between the secondary database and the distributed database system and a synchronization module that synchronizes the secondary database with one of the databases of the distributed database system using the modification module. Each database in the distributed database system stores an identification mapping database having an assigned version number.

Abstract: A system, method, and processor readable medium containing code for causing a processor to synchronize a secondary database system, such as one stored on a palmtop electronic device, with a distributed database system, comprising a main database and at least one replica database. The system further comprises a modification module that contains entries for modifications that have been made to the secondary database since a previous synchronization between the secondary database and the distributed database system and a synchronization module that synchronizes the secondary database with one of the databases of the distributed database system using the modification module. Each database in the distributed database system stores an identification mapping database having an assigned version number.