On 6/2/05 5:50 PM, "Larry Stone" <[EMAIL PROTECTED]> wrote:
> On 6/2/05 2:27 PM, Brad Knowles at [EMAIL PROTECTED] wrote: > >> Proper mailing list management systems don't use >> blind-carbon-copies. The equivalent that they do use is to list >> multiple envelope recipients, whose addresses are not necessarily >> referred to on the "To:" or "Cc:" headers. > > Brad, I realize this is getting a little off of Mailman but how is that > different from what a BCC does? A BCC "header" is local to the originating > MUA - it doesn't appear in the transmitted message but the BCC recipients do > become envelope recipients. So from the view of the MTA, isn't what you say > Mailman does exactly the same as what the MUA does with a BCC? Not really. Some MUAs preserve the full Bcc header for anyone in that header, but removed it for the To: and Cc: recipients. Others set up a Bcc: header with just the individual recipient's address (clearly these talk to the MTA separately for each Bcc: recipient). And most remove it. All these behaviors are sanctioned by the RFCs (clearly a compromise in the RFC development process). Also, there are more knobs--outside Mailman--that can be messed with. I don't know how in Postfix; I never will know how in sendmail (I'm 66--I won't live long enough to learn sendmail). In Exim, it's a matter of settings in a transport, with routers feeding appropriate domains to the transport. So you could arrange to send large batches most places, batches of one to AOL, and batches of 5 to xyz.example.com, for example. Also, I don't believe that the original posting's 5xx response meant that the receiving site thought that your machine is an open relay--it guessed it might be because of too many invalid recipient addresses in one connection, which is typical of spamming through open relays (and spamming generally). --John ------------------------------------------------------ Mailman-Users mailing list [email protected] http://mail.python.org/mailman/listinfo/mailman-users Mailman FAQ: http://www.python.org/cgi-bin/faqw-mm.py Searchable Archives: http://www.mail-archive.com/mailman-users%40python.org/ Unsubscribe: http://mail.python.org/mailman/options/mailman-users/archive%40jab.org Security Policy: http://www.python.org/cgi-bin/faqw-mm.py?req=show&file=faq01.027.htp
