Redact IP addresses from Received field

[Rich P]

In order to hide IP addresses for outbound mail, I configured James to remove 
the Received field using this in mailetcontainer.xml:


<mailet match="SenderIsLocal" class="RemoveMimeHeader">
    <name>Received</name>
</mailet>

This works but I think it's triggering SPAM filters for downstream recipients.  
Is there a simple way to leave the field intact but redact the IP addresses?


Thanks.