Accessing email text sent from Sendmail in a Shell script

Hi
I'm new to shell scripting, and can't find the answer to this in any documentation.

I have set up Sendmail to redirect mail onto a shell script. My question is;
how do I then access the email text to process it within the script?

Is there an environment variable for accessing passed in text, I'm assuming it would be treated the same as text entered via stdin, would something like $* or $@ work (I know these are meant for arguements)?

or is there a way to load in any passed on info into a variable something like
variable=stdin

Thanks in advance for any replies
David

"man aliases" should tell you how to send mail into a program.

In a ksh or bash script you can read from stdin with:
read line
which reads one line into the variable $line. You would probably use a loop something like:

while read line ; do
echo line = $line
done