At 7:50 PM -0500 2005-06-02, Larry Stone wrote: > 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?
Well, "Bcc:" is a header. Mailman never uses a "Bcc:" header. In terms of the implementation, by listing multiple envelope recipients, there is no practical difference. The technical difference is that a "Bcc:" header is something that would typically be added by an MUA, but an MUA wouldn't know enough about the SMTP protocol in order to be able to provide multiple envelope recipients directly. In this case, it's up to the MTA to take the "Bcc:" header and interpret those contents appropriately. However, Mailman does know enough about the SMTP protocol that it can by-pass the use of a "Bcc:" header, and go straight to listing multiple envelope recipients. The difference is akin to putting a stamp on an envelope and putting that in the mailbox yourself, or going down to the post office with a letter in-hand and paying to have the person at the window put the stamp onto the letter and put the envelope into the bag. Do you understand how to put a stamp onto an envelope and where the stamp goes, how many stamps of what kind to use for what type of mail you're sending and how much it weighs, and do you have a ready supply of the appropriate stamps at your disposal? -- Brad Knowles, <[EMAIL PROTECTED]> "Those who would give up essential Liberty, to purchase a little temporary Safety, deserve neither Liberty nor Safety." -- Benjamin Franklin (1706-1790), reply of the Pennsylvania Assembly to the Governor, November 11, 1755 SAGE member since 1995. See <http://www.sage.org/> for more info. ------------------------------------------------------ Mailman-Users mailing list Mailman-Users@python.org 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