Send email using mail

Linux and Unix-Like Red Hat
1

I need to send an email from linux using mail command. The problem is I can't hardcode the to: emailaddress, The email address is saved in a recipient.lst file on the server in this format:
To: a@b.com

Thanks a lot.

il_labor

2

Try with the below ..

$ echo "" | mail -s "Test email" $(nawk -F: '/^To: /{print $2}' recepient.lst)