hi there man i configure my server and i also use cashe but till yet i did not face any problem, any way if you ask any user can open mail box of other without password, no its not i do all thing to do same but ever time hotmail ask password and yahoo more secure then hotmail so its not possible to open others mail box. and try to check your client setting may be there in cashe size is very high. regard Waseem Javid CICS Admin