I am having a little problem with permissions of a file, and can´t find a solution, I have a mail Server with Postfix, Courier and Roundcube as Webmail. When I give in the user´s directory permissions to root (/maildir/user root:root), login is ok in Roundcube but can´t send mails, and logs show: "/maildir/domain.com/user/tmp/mail_id.server_name: Permission denied)" If I give in user´s directory permissions to another user, for example mail (/maildir/user mail:mail), I can send mails but can´t login into Roundcube Webmail. This is what I find with lsof: lsof -i :143 COMMAND PID USER FD TYPE DEVICE SIZE NODE NAME couriertc 2849 root 3u IPv4 7630 TCP mail-server:imap2 (LISTEN) couriertc 2849 root 5u IPv4 7631 TCP localhost:imap2 (LISTEN) Seems that root is the username being used. I´ve changed the courier directory´s UID and GID to mail:mail but when I do lsof -i :143 still root as the username in used. Any help will be welcome. Thanks for your attention Sirs. Best regards,