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I wish I knew sendmail better. If I have to send out 100 identical emails, which is the more efficient way: build a 100 email long BCC: field and mail() it once from PHP, or make a loop and send 100 individual mail()s? I figure it shouldn't really matter, because sendmail still has to send 100 messages either way. Right? Or does the BCC: actually make things easier on my server?