When I send a mail with attachment an excel file ,the attachment is also displayed along with the mail as part of the mail and not as an attachment.Moreover the content of the excel file is not displayed in excel format . I don't know what content type for excel attachment need to be set in the multipart.Is there any way to avoid dispaying the attachment in the same page?.

The attachment displayed like this.

Subject: Test mail for attachment

			

			Mime-Version: 1.0
			

			Content-Type: multipart/mixed;
			

			boundary="----=_Part_0_1530713.1023705540244"
			

			

			------=_Part_0_1530713.1023705540244
			

			Content-Type: text/html; charset=us-ascii
			

			

			

			Content-Transfer-Encoding: 7bit
			

			Content-Disposition: inline
			

			

			Attachment Type: xls
			

			------=_Part_0_1530713.1023705540244
			

			Content-Type: application/octet-stream; name=CDDAudit.xls
			

			Content-Transfer-Encoding: base64
			

			Content-Disposition: attachment; filename=CDDAudit.xls
			

			

			0M8R4KGxGuEAAAAAAAAAAAAAAAAAAAAAPgADAP7/CQAGAAAAAAAAAAAAAAABAAAAIQAAAAAAAAAA
			

			EAAA/v///wAAAAD+////AAAAACAAAAD/////////////////////////////////////////////
			

			------=_Part_0_1530713.1023705540244--