Abstract: In particular embodiments, a mailbox server is operable to receive, from a client, a message to be delivered to an endpoint; store the message in a mailbox associated with the user; access a set of policies for the client or the endpoint; determine a delivery channel for the message based on the policies; and transmit the message to the endpoint through the delivery channel. In particular embodiments, the mailbox server may transmit SMS messages via a special bind with a recipients SMSC, or via a carrier short code. In particular embodiments, the mailbox server may transmit the message as an email or via an internal messaging system over a packet data connection.

Abstract: Methods and systems directed to retrieving voicemails from a voice mailbox server. In particular embodiments, a mailbox server may receive a notification from the voice mailbox server and connect to the voice mailbox server providing the credentials of a client device, and pull new voicemails for storage at the mailbox server. In particular embodiments, mailbox server periodically polls voice mailbox server for new voicemail messages. In particular embodiments, a client device polls or receives notification of new voicemails, and transmits a downloaded message to the mailbox server.

Abstract: In one embodiment, a method includes accessing a communication sent from a first user to one or more second users; searching multiple communication threads for a specific thread associated with both the first and second users; and if the specific communication thread is located, then adding the communication to the thread; and for each second user, sending the communication to the second user using a communication protocol selected determined to be appropriate.