| 摘要 |
A method and Internet Message Access Protocol, IMAP, server (4) for responding to a LIST request from an IMAP client device (3) by returning (29, 39) a list containing only mailboxes having message content or metadata that has changed since the client device last synchronized with the mailboxes. The client device (3) places in the LIST request (24, 36), a BOXCHANGEDSINCE MODSEQ value, which is the highest modification sequence attribute, MODSEQ, value obtained by the client device when the client device last synchronized with the mailboxes. The server (4) compares (25) a current MODSEQ value for each mailbox with the BOXCHANGEDSINCE MODSEQ value received in the LIST request, and includes in the returned list, only mailboxes with current MODSEQ values higher than the BOXCHANGEDSINCE MODSEQ value received from the client device. |
