Because there are no standard mail-agents except for sendmail, the wrapper script cfwrap calls its own simple mail agent cfmail to send the message. Note that the flags variable in the script cfmail arranges for the mail message to be sent with a return address other than "root". This means that if the recipient of the mail should decide to hit `r' for `reply' to reply to the message, you have a chance of getting to see the message before it vanishes along with the rest of the mail to root into the same black hole that swallows up all those credit cards, house-keys and odd socks that disappear on a daily basis.
You might have to tweak the scripts slightly to tailor them to your own needs. They are used as follows:
host% echo test .... | cfmail -s "Test message" mark
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