Henrik Krohns wrote:
On Mon, Oct 23, 2006 at 05:53:30AM -0400, Gerard Seibert wrote:
Anyway, we send out several times a week flyers to our customers. These
mailings range from 750 to 2000 messages per run. To scan 2000 identical
messages is insane, not to mention a total waste of system resources.
Other than going to the expense of setting up a separate mail server,
etc. I am looking for a way to circumvent this annoyance.
So are they sent using Bcc (wise) or as invidivual messages (very stupid)?
Any sane system (I prefer postfix/amavisd-new) handles those as a single
message.
The question is not so much Bcc: vs To: as it is a question of how many
RCPT TO: SMTP items are there in one "message"?
RFC2821 (4.5.3.1 recipients buffer) says this limit must not be less
than 100. Along those lines it further explains...
"A client that needs to deliver a message containing over 100 RCPT commands SHOULD be prepared
to transmit in 100-recipient "chunks" if the server declines to accept more than 100
recipients in a single message."
So, depending on where, exactly, in the process the smtp envelope is added and
where scanning outbound scanning occurs, an outbound message could be scanned
once, regardless of the number of recipients.
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