> -----Original Message----- > From: owner-postfix-us...@postfix.org [mailto:owner-postfix- > us...@postfix.org] On Behalf Of Noel Jones > Sent: Monday, February 14, 2011 6:10 PM > To: postfix-users@postfix.org > Subject: Re: Summarizing email > > On 2/14/2011 10:56 AM, Scappatura Rocco wrote: > > Hello, > > > > I have different aliases configured under the same domain, say: > > > > ali...@domain.tld ali...@domain.tld ali...@domain.tld > > > > which forward an email to the same mailbox, say: > > > > mail...@domain2.tld > > > > I have tried the following experiments.. > > > > EXPERIMENT 1: mail...@domain2.tld is the mailbox ali...@domain.tld > (i.e.: the aliases above are all aliases of the same email address > ali...@domain.tld) > > ============ > > > > I have a postfix mail server (Postfix+MySQL+Courier-IMAP+Maildrop). > In the mailbox for ali...@domain.tld I saw three copy of the same > message: one for each alias. Every one has the same message ID. > > > > EXPERIMENT 1: mail...@domain2.tld is NOT the mailbox > ali...@domain.tld > > ============ > > The domain domain2.tld is managed on a different mailserver. It a MS > Exchange mailserver which is not managed by me. When I get the messages > on my MS Outlook with Windows protocol, I get only one message with > three recipient: > > > > ali...@domain.tld ali...@domain.tld ali...@domain.tld > > > > Now, I have the following questions: > > > > 1) Why is there this different behavior in the situations above? > > Because they're different systems. > > > 2) Who collapse the three email into one in CASE 2? The MTA or the > MUA? > > Probably the delivery agent. > > > 3) Is it possible to get the behavior on postfix post office while > download messages with POP3/IMAP protocols? > > Configure the delivery agent to discard duplicate messages. > The postfix delivery agents don't support duplicate > suppression, so you'll need maildrop or procmail.
Very clear thanks. > -- Noel Jones rocsca
