@Yogita_Gaikwad
please follow these steps,
1- Convert body text to a html file.
2-Open that html table in browser.
3-Using extract table or extract structure activity to extract the data into data table
4- save in excel
If you are using get outlook messages activity then output should be list
Take for each loop configure type argument as
System.net.mail.mailmessage
Then item.body.tostring
you can get body of email
Regards
Gokul