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On Mar 25, 2008, at 5:33 AM, Julian Mehnle wrote:
Jo Rhett wrote:
On Mar 24, 2008, at 6:45 PM, Mark Sapiro wrote:
I still don't get what you mean by "properly deal with DSNs". Are
you saying that an MTA should never return a DSN? It should either
reject the mail during the incoming SMTP transaction or forever hold its piece?Yes. And not just me, but a dozen different blacklists. RTFM "backscatter"
You can however safely send a DSN if an SPF[1] check for the incoming message passes.
I've added this to http://wiki.list.org/display/DEV/Mailman+3.0
- -Barry
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