SYSTEM AND METHOD FOR ENHANCED CLIENT/SERVER SYNCHRONISATION Russian patent published in 2013 - IPC G06F15/167 

FIELD: information technology.

SUBSTANCE: computer readable data medium having computer executable commands for performing the following operations: maintaining, in a first server component of electronic mail, independent first data relating to changes in an electronic mail message visible to the client component of electronic mail; accessing the independent first data in a second server component of electronic mail; encoding, in the second server component of electronic mail, said independent first data as a range, said range having a minimum index number and a maximum index number; second data are maintained in said second server component of electronic mail, which relate to changes in the electronic mail message visible to said client component of electronic mail.

EFFECT: providing compatibility of electronic mail components of different versions with minimisation of the size of data transferred between network components of electronic mail, while detecting changes in electronic mail messages.

2 cl, 23 dwg