Hello Gunter Thanks now it works fine ! Question for INDEX=MEMORY, is it much perfomance lost ? thank all who helped me ----- Original Message ----- From: "Gunter Ohrner" <G.Ohrner at post.rwth-aachen.de> To: <dovecot at dovecot.org> Sent: Sunday, May 27, 2007 10:23 AM Subject: Re: [Dovecot] question mailbox format