On Fri, Jan 13, 2017 at 09:25:51PM +0000, Fazzina, Angelo wrote: > Sorry, my mail flow is > > Mail from internet -> barracuda appliance (MX) -> smtp server running > postfix -> destination mail server where mailbox resides. > > My point is I checked all 5 cudas manually as well as syslog data going to > SPLUNK. > There is no record of any rejected email, only the one that got delivered. So > If I did not miss any logs, they only sent ONE email,
One message does not imply one recipient. Are you sure that the Barracuda did not reject one of the recipients? > And the CC field is just extra info. The Cc: field allows the message recipients to reply to everyone else (disclosed) who received the email. It is not used in email routing. The sender's MUA parses the Cc: field to set the initial message envelope. > From this thread I think the sender has to send an individual email > to each address, No, a message can and often does have multiple envelope recipients. Find and read a decent tutorial on how email works. -- Viktor.