first of all,
i could not get multiple CC's get to work:
-----------------------------------
      function send(){
            $headers = "";

            if($this->from_address != ""){
                  $headers .= "From: " . $this->from_address . "\r\n";
            }
            if($this->cc_address != ""){
                  $cc = str_replace(" ","",$this->cc_address);
                  $cc = str_replace(",",", ",$cc);
                  $headers .= "Cc: " . $cc . "\r\n";
            }
            mail($this->to_address, $this->subject, $this->message, $headers);
      }
	mail($this->to_address, $this->subject, $this->message, $headers);
------------------------------------------
this only sends a cc to the first cc address,
so i checked what the headers looked like and i noticed that there was a blank space at the end.

so i apply the trim function this to $headers:
---------------------------------------------
      function send(){
            $headers = "";

            if($this->from_address != ""){
                  $headers .= "From: " . $this->from_address . "\r\n";
            }
            if($this->cc_address != ""){
                  $cc = str_replace(" ","",$this->cc_address);
                  $cc = str_replace(",",", ",$cc);
                  $headers .= "Cc: " . $cc . "\r\n";
            }
            $headers_trimmed = trim($headers);
            mail($this->to_address, $this->subject, $this->message, $headers_trimmed);
      }
---------------------------------------------

and there you have it:
FATAL: emalloc(): Unable to allocate -10787289 bytes


---
'./configure' '--with-apxs=/usr/local/apache/bin/apxs' '--with-imap' '--with-mysql=/usr' '--enable-track-vars' '--with-openssl=/usr/local/ssl' '--enable-sockets' '--with-xml' '--with-zlib' '--with-java=/usr/local/j2sdk1.4.0' '--with-pgsql'

apache 1.3.26
sendmail-8.9.3-20