在dovecot上设置虚拟用户的权限

Question

我有一个使用centos 7连接到roundcube的dovecot邮件服务器。我有一个静态用户（vmail）和两个虚拟/ dovecot用户，这两个用户都在vmail权限下运行。是否可以仅使用一个系统用户来设置dovecot用户的权限（它们保存在/ etc / dovecot / passwd下）？ 我尝试设置UID，但由于无法正常工作，似乎出现了错误。这也是dovecot.conf配置：

dovecot.conf


# by changing syslog configuration also, but this is easier.
log_path = /var/log/dovecot.log
info_log_path = /var/log/dovecot-info.log

# Disable SSL for now.
ssl = no
disable_plaintext_auth = no

# We're using Maildir format
mail_location = maildir:~/Maildir
# mail_location = mbox:~/mail:INBOX=/home/%u/mail  #mail_location = 
maildir:~/Maildir
# If you're using POP3, you'll need this:
pop3_uidl_format = %08Xu%08Xv

# Authentication configuration:
auth_verbose = yes
auth_mechanisms = plain


passdb {
  driver = passwd-file
  args = /etc/dovecot/passwd
}

userdb {
  driver = static

 default_fields = uid=vmail gid=vmail home=/var/vmail/%u
 override_fields =
}

end of dovecot.conf

我需要设置2个dovecot用户，一个具有rw权限，另一个具有rwx，但我找不到任何解决方案（使用这种东西的新手总数）。欢迎每一个建议！