On Thu, 31 Mar 2016 19:56:04 +0530, use experience stated: >> unix_listener auth-userdb { >> >> mode = 0777 >> >> } Try adding: user = vmail group = vmail Why are you using mode = 0777? I never use more than 0666. Usually just 0660 and all works well. Try to include the "group" in your definitions. Restart dovecot and see what happens.