macos - Attachment is not attached; rather it shows the contents in mail body using uuencode or mail command in mac osx

I use the below command to attach a file.

mailx -s "Report 05/06/07" add@dom.com < /test_output/report.html


uuencode /test_output/report.html /test_output/report.html | mail -s "mailing my c file" add@dom.com

but the attachment is not attached with mail. The attachment content is shown in the mail body.

How i can solve this or is there any other way to send mail automatically with the attachment?