Hi,

Please write with more details as RavinderSingh13 said.

However, my apologizes to you to divert to your first post/command .

Seems mailx itself has option to attach a file.

Code:

man mailx
-a file
              Attach the given file to the message.

Here is what i tried and it worked successfully.

Code:

mailx -s "hello" -a 123.csv myaddress@domainxyz.com <<< hi

I got a mail as follows:
"hi" in body message with subject "hello" and file attachment "123.csv".
i could read 3 lines of its contents.

Please give a try.