Hi there, I tried to find the answer by myself but unfortunately the problem outgrow me. Would be appreciated for any help and my problem is as fallows. I configured apache, postfix, postfixadmin, dovecot and mysql and so on and everythink seems to work fine. Problem appears when I copy/move messege in Outlook 2010/20013 (tested on both), after copy the messege size becomes 0 bytes and "attachement pin" disapears. Further more, I dont see all messages in subfolders. There is no problem in RoundCube I can see all messages and attachement size is seen correctly. I did not find any suspisious entries in log file. Not sure what else can I say. Here is my dovecot conf: Code: # 2.1.7: /etc/dovecot/dovecot.conf # OS: Linux 3.2.0-4-amd64 x86_64 Debian 7.6 ext4 auth_debug = yes auth_debug_passwords = yes auth_mechanisms = plain login auth_verbose = yes disable_plaintext_auth = no mail_debug = yes mail_gid = 3000 mail_location = maildir:/var/vmail/%d/%n:INDEX=/var/vmail/%d/%n mail_uid = 3000 namespace inbox { inbox = yes location = mailbox Drafts { special_use = \Drafts } mailbox Junk { special_use = \Junk } mailbox Sent { special_use = \Sent } mailbox "Sent Messages" { special_use = \Sent } mailbox Trash { special_use = \Trash } prefix = INBOX. separator = . } passdb { args = /etc/dovecot/dovecot-mysql.conf.ext driver = sql } postmaster_address = [email protected] protocols = " imap lmtp pop3" service auth-worker { group = mail user = vmail } service auth { unix_listener /var/spool/postfix/private/auth { group = postfix mode = 0666 user = postfix } user = root } service lmtp { unix_listener /var/spool/postfix/private/dovecot-lmtp { group = postfix mode = 0600 user = postfix } } ssl_cert = </etc/dovecot/dovecot.pem ssl_key = </etc/dovecot/private/dovecot.pem syslog_facility = local1 userdb { args = /etc/dovecot/dovecot-mysql.conf.ext driver = sql } protocol imap { mail_max_userip_connections = 10 } At the end sorry for my english and thanx for any help.