On Thursday, February 26, 2009 at 16:54 CET,
Zoltan Balogh <zee.bal...@gmail.com> wrote:
> I have a setting with two postfix servers:
> - the server1 is a MX for many virtual domains including somedomain.com;
> - the server2 retrieves mail with fetchmail from server1 via POP3 and
> distributes it to local users' mailboxes.
>
> server1 is set up in a way that a mail addressed to let's say 5
> somedomain.com recipients is delivered as one message (which is what I
> expect). The message is then downloaded by fetchamil to server2 and
> distributed based on To: and CC: header information to local
> mailboxes.
Email must not be delivered based on header recipients. Sorry, but this
is just wrong. Multi-drop POP mailboxes is difficult and error-prone.
The server from which you fetch the messages must split the messages
and insert the original envelope recipient into each message (which
typically means that a message with N recipients turns into N
single-recipient messages).
> The problem in this setting arises when the somedomain.com recipients
> are listed in Bcc: - server1 receives the email and delivers it as one
> instance, of course without Bcc: header information, to local mailbox
> - server2 downloads the message but is unable to decide where to
> deliver the message, because there are no information about recipients
> in the mail header.
>
> Is there a way to solve this on server1? I mean adding recipients
> somewhere to the mail header so server2 knows where to deliver? I
> already tried to set "enable_original_recipient" to "yes" - in that
> case a "X-Original-To:" is added but one copy of the mail is delivered
> for each recipient on server1. Or would adding other header
> information solve this (e.g. "X-Envelope-To")?
Is it a problem that you get one message per recipient? More data, yes,
but on the other hand you get correct deliveries.
--
Magnus Bäck
mag...@dsek.lth.se
