my $req = POST(
    "mailto:".$rec_email,
    From =>"$send_email",
    Subject =>"$subject has changed",
    Content_Type=> 'text/plain; charset=ISO-8859-1 ; boundary="--text"',
    Content=>"Dear $rec_name,we want to inform you <wall of text>"
);

#and then, i want to include 2 files here