On 5/25/2015 9:54 AM, Mark Sapiro wrote:
I overlooked this in my earlier reply. If you mean that in your post you have requested to be notified when the recipient reads the message, Mailman makes some effort to remove all such requests from message headers before sending the message, so any DSN you received is more likely a bounce, but you shouldn't be seeing those either as they should be delivered to the Mailman's bounce processing.
And some people will routinely discard or dismiss those requests, too. Return receipt is not a reliable way to tell if someone has read the message unless all of the recipients are willing and they actually get the request.
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