the php default configuration has sendmail configured ; For Unix only. You may supply arguments as well (default: "sendmail -t -i").
configuring it as sendmail_path=/usr/sbin/exim -t and it works ! -- ## List details at http://www.exim.org/mailman/listinfo/exim-users ## Exim details at http://www.exim.org/ ## Please use the Wiki with this list - http://www.exim.org/eximwiki/
