<cfset local.objIMAP = structNew()>
<cfset local.objIMAP.server = "imap.gmail.com">
<cfset local.objIMAP.username = "username">
<cfset local.objIMAP.password = "password">

<!--- Open the connection --->
<cfimap
    action="open"
    secure="yes"
    connection="myConnection"
    attributeCollection="#local.objIMAP#">

<cfimap
  action="getHeaderOnly"
  connection="myConnection"
  name="getHeaders">

<!--- Get the messagenumber of latest mail --->
<cfquery dbtype="query" name="getID">
   SELECT MAX(getHeaders.messagenumber) AS latestMessage
   FROM getHeaders
</cfquery>
<cfimap
  action="getall"
  connection="myConnection"
  name="getAttachment"
  attachmentpath="E:/"
  MessageNumber="#getID.latestMessage#">