>I took a different approach. I left the bounce detection on but switched all @yahoo.com accounts to digest mode. >Since the mail now comes from the list instead of the @yahoo.com sender there are no rejections. Not a perfect >solution but it prevents harm to non-@xxxxxxxxx list participants. I don't see how that helps. The problems occur when a list message with "From: blah@xxxxxxxxx" is delivered to a Gmail or Hotmail or Comcast address which follows the DMARC advice and bounces the message. R's, John