What are the steps or a link for the steps to create a video in adobe captivate then send it as an MP4 file email?

Keep in mind that when you publish to MP4 any interactive elements of your course will be lost and viewers will only be able to watch your project in a linear fashion.

1. Create your project content in the CPTX file.
2. Click the Publish button, and select Publish to My Computer from the options.
3. In the Publish to My Computer dialog, open the Publish As drop-down and select Video.
4. Configure the options for the video and then click the Publish button.
5. Emailing your video file will only be practical if the file is quite small.  Adobe Captivate does not handle emailing of files.