E-mail synchronization between heterogeneous mail servers

A system for synchronizing e-mail messages for a user, comprising:

• an e-mail control, to request that e-mail messages addressed to the user be sent, from an external e-mail server;
• storage, accessible by the e-mail control, to store each e-mail message of a plurality of e-mail messages addressed to the user and that are sent from the external email server;
• first message identifier storage, accessible by the e-mail control, to store a message identifier for each e-mail message of the plurality of e-mail messages;
• and
• second message identifier storage, accessible by the e-mail control, to store previously synced message identifiers from consolidation e-mail storage,
• the consolidation e-mail storage to have at least two states, including a first state having at least one e-mail message for the user which has been deleted from the external e-mail server, and a second state having no e-mail message for the user which has been deleted from the external e-mail server,
• the email control to compare message identifiers in the first message identifier storage to message identifiers in the second storage to find a message identifier in the second message identifier storage that is missing from the first message identifier storage, and delete the e-mail message that corresponds to the missing message identifier from the consolidation e-mail storage.

A system for synchronizing e-mail messages for a user, comprising:

• an e-mail control, to request that e-mail messages addressed to the user be sent, from an external e-mail server;
• storage, accessible by the e-mail control, to store each e-mail message of a plurality of e-mail messages addressed to the user and that are sent from the external email server;
• first message identifier storage, accessible by the e-mail control, to store a message identifier for each e-mail message of the plurality of e-mail messages;
• and
• second message identifier storage, accessible by the e-mail control, to store previously synced message identifiers from consolidation e-mail storage,
• the email control to compare message identifiers in the first message identifier storage to message identifiers in the second storage to find a message identifier in the first message identifier storage that is missing from the second message identifier storage, and delete the e-mail message that corresponds to the missing message identifier from the external e-mail server.