建立自己的邮箱域，如：XXX@rzz.com等，然后，员工就可以注册并使用本公司内的邮箱账号办公了。
It's a regular POP/IMAP account, but it's possible to have an autodiscover which give settings to Outlook. Maybe this link helps you undestand what I want : email-autodiscover (in mail directory, you'll find the xml which is readding by Outlook). So, when I add an account in ...