1. Open outlook and enter the Developer tab.

2. Click the VisualBasic button to open the VBA editor.

3. In the VBA editor, select Outlook Project from the drop-down menu of Local Project.

4. In the Project Resources pane, double-click the project in the "This Computer" folder.

5. double-click the this pc folder, and then double-click the ClassModules folder.

6. In the ClassModules folder, double-click the file named Application or Outlook (depending on the version of Outlook).

7. In the code editor, find the following line of code:

8、PrivateSubApplication _ ItemSend(ByValItemAsObject，CancelAsBoolean)；

9. Comment out or delete this line of code to disable VBA e-mail function. For example, you can modify this line of code to:' privatesubapplication _ itemend (byvalitemasobject, cancelasboolean);

10. Save and close the VBA editor. Outlook is an email client software developed and published by Microsoft. It can be used to manage information such as email, calendar, tasks and contacts. Outlook also includes other functions, such as scheduling, memos, notes, mail filtering and automatic reply.