The way you have it written, there's an extra newline before the From: line, which will probably cause problems (you don't want a blank line in your headers). Have you tried:

open(MAIL, "|/usr/lib/sendmail -oi -t") || die "Can't open sendmail: $
+!";
   print MAIL qq|From: Me <me\@here.com>
To: You <you\@there.com>
Subject: Email

body text|;

close(MAIL);
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