RE: email API... to and CC:the same..

[Tim McCarthy <timm@xxxxxxxxxxxx>]

        [Tim McCarthy]  Perhaps I was misleading. Here's how it works...
An SMTP client puts together a list of receivers from the mail TO/CC and
BCC addresses. When talking to the SMTP server the client "usually"
sends a RCPT TO for each receiver prior to sending the message. At this
stage the server has no idea who's CC'ed and who's BCC'ed it just has
multiple receivers. When the SMTP server forwards this mail item to a
domain it can forward it using the same multi-RCPT TO/single DATA method
or break it into individual RCPT TO/DATA items. That's a server
implementation dependant issue.  
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