You provided far too little information for us to be able to help. If you are using smtplib, it doesn't even look at message's headers to find the recipient list; you must use the rcpt() method to specify each one. If you are using the sendmail method, the "to_addrs" list has no relationship to the headers of the actual message---it simply calls rcpt() once for each address in to_addrs. The example in the docstring doesn't even *have* a To: header in the message!
Jeff
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