So, what have you tried to put many lines into the parameter for Message? I ask, because the mechanisms that Perl supports are the same that the various shells, and certainly ksh support. Also see perlop on quotes and quote-like operators.

Also, you could assign all the many lines to a variable and then use that variable as the value:

my $message_text = "... many lines ...";

...
    Message => $message_text,
...
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I will review the perlop and let you know how things go.
Ken

This is how I'm sending the contents of a file via mail:

($HC is the file path to the file I'm going to send)

open(MAIL, "|mail $EMAIL");
print MAIL "To: $EMAIL\n";
print MAIL "From: $mail_from\n";
print MAIL "Subject: $mail_sub\n";
print MAIL "Content-Type: text/plain; charset=\"iso-8859-1\"\n";

open(MESSAGE, "<", "$HC") or die "$!";
print MAIL <MESSAGE>;
close(MESSAGE);
close(MAIL);
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Update: I should note that the reason I don't use Corion's method listed above is because the file was already created before sending, and it seemed silly to me to read it all into a variable to send the variable. If the performance hit of reading/writing from a disk was already made, didn't seem much of a benefit to add more logic into the operation.

I need to expand on my messages. My program needs to write out messages at different times, thus why I write out to a file. When program is finished, I need to mail the results with all the information from the message file. I believe the here document will not work.
Ken

You could instead of appending to a file, append to a variable that holds the message. But then again, who am I to question your beliefs.

In ksh, I am creating lines like:
echo "This is line1" >> mail_content (file)
echo "this is line2" >> mail_content

Then, "mail ..subject.. ip address.. < mail_content"

I am assuming same process in Perl??
Ken

That's not the process I would have used under ksh. I would build up a variable in ksh using a here-document or a string that spans multiple lines. The equivalent process to your echo approach would be to append the strings to a variable using the dot operator (.). Maybe you want to read perlop now?