Saving sent mail

Simon Harrison <[email protected]> Sun, 7 Nov 2021 11:51:53 +0000

Newsgroups	gmane.comp.gnu.mailutils.bugs
Message-ID	<20211107115153.5d38e838@jupiter>

If I send an email like this:

echo "hello" | mail -s 'hello' someone@somewhere

How can I save the mail in a "sent" folder or mbox? 

Thanks,

Simon

-- 
Web: https://simonh.uk
Email: [email protected]