Manage suggested recipients in the To, Cc, and Bcc fields in Outlook
Use the Contact Suggestions List and Recent People suggestions for new Outlook. As you begin to type a name in a To, Cc, or Bcc box, the Contact Suggestions List shows up to five matching names or addresses. If you type a " b " character in one of the recipient fields, for example, the list presents suggested matches.
Applies To:
Outlook for Microsoft 365, Outlook 2021, Outlook 2019, Outlook 2016, New Outlook for Windows
View internet message headers in Outlook - Microsoft Support
Header information appears in the Internet headers box. Tip: You can highlight the information in that box, press Ctrl+C to copy, and paste it into Notepad or Word to see the entire header at once. Learn how to view the Internet header information for an email message.
Applies To:
Outlook for Microsoft 365, Outlook 2021, Outlook 2019, Outlook 2016, Outlook 2013, Outlook.com, New Outlook for Windows, Outlook on the web for Exchange Server 2016, Outlook on the web for Exchange Server 2019
发送电子邮件时，我收到 550、553 或中继禁止的错误 - Microsoft 支持
发送遇到中继错误的电子邮件时，SMTP (传出) 电子邮件服务器可能会返回电子邮件，其中包含如下错误消息之一：. “邮件无法发送，因为其中一个收件人被服务器拒绝。. 被拒绝的电子邮件地址为“< someone@example.com >”。. 主题：“<测试>”，帐户：“<测试 ...
Applies To:
Outlook for Microsoft 365, Outlook 2021, Outlook 2019, Outlook 2016, Outlook 2013