I have a windows server running Imail. I have a Red Hat server that I have setup with DKIM running sendmail. It signs messages that originate from it but I need to send messages from my windows server through the sendmail server and have it sign them as well. I have added the ExternalIgnoreList option to the config file with the IP address of my windows server. There is no signature. Any help with this would be greatly appreciated.
 
Nick