After sending attachment through mail using ABAP program.....

Hello Experts,

I am facing a problem to fulfill a requirement.

My requirement is....sending the data of the internal table to an external mail with attachment(excel format). I have done with this. But when o am opening the excel sheet(attachment) it is showing a message that 'The file you are trying to open is in different format than specified by the file extension'

I am using the extension 'XLS' and 'RAW ' in the coding for the file formats.

You can please suggest your solutions if you know or already faced this type of issues.

Thank you.

Regards,

Anand