XML email bursting program: is there a way to compress excel file or send output in excel binary for

I am trying to use XML email bursting program to email an excel file as attachment.

Looks like the bursting program is not sending email if my excel output is crossing 20MB.

Please let me know if there is a way to compress excel file in bursting program OR can we have excel binary as output type.

Below is my XML bursting file:

<xapi:requestset xmlns:xapi="http://xmlns.oracle.com/oxp/xapi" type="bursting">

<xapi:request select="/XXWDAUDITALERT/LIST_G_MAIN">

<xapi:delivery>

<xapi:email id="123" server="${MAILHOST}" port="${MAILPORT}" from="no-reply@abc.com" reply-to="">

<xapi:message id="123" to="" cc="${TOMAILLIST}" attachment="true" subject="${MAILSUBJECT}">