[多选] You work as the enterprise exchange administrator at Xxx .The Xxx network is running in a Microsoft Exchange Server 2010 environment.A SMTP server on the Internet has rejected some email sent from Xxx .What actions must you take to determine why this happened？（）

简述消毒防腐药作用的因素。 You have an Exchange Server 2010 server that has the Mailbox， Hub Transport， and Client Access server roles installed. You need to ensure that users can send and receive e-mail by using Windows Live Mail or Microsoft Outlook Express.  What should you do on the server（）？    Install and then configure the SMTP server feature.。 Start the Microsoft Exchange POP3 service and then set the startup type to Automatic.。 Modify the properties of the MSExchangePOP3 （TCP-in） Windows Firewall rule.。 Modify the properties of the MSExchangeMailSubmission - RPC （TCP-in） Windows Firewall rule.。 均衡价格 How many years of experience do you have with deploying and maintaining a virtualization infrastructure using any desktop or server virtualization technologies?（） I have not done this yet.。 Less than 6 months。 More than 6 months but less than 1 year。 1 - 2 years。 2 - 3 years。 More than 3 year。 许可审核机关应当对申请企业哪些场所设施进行现场实地考察？ You work as the enterprise exchange administrator at Xxx .The Xxx network is running in a Microsoft Exchange Server 2010 environment.A SMTP server on the Internet has rejected some email sent from Xxx .What actions must you take to determine why this happened？（）