Hi there, 

If Postfix server gets a mail message with multiple TO: address (i.e.,
multiple recipients), does Postfix send one message to each address? If
so, at what stage does this happen? The postfix log seems to indicate
that.

For my Postfix, I customized my transport in postfix like this, 

transport_maps = hash:/etc/postfix/transport

where the transport file reads like this (connector is a script that
calls a program to consume emails).

<my domain name>         connector:

I observed that the transport only get one single message with multiple
TO: address in it. So, this means my transport should do the work of
sending to multiple destinations?

If I do not use any customized transport, rather, use the default
Maildir/ format, I am sure that Postfix will place one message in each
destination folder. 

My assumption, by using a customized transport, I am taking away what
Postfix delivery agent does, which is copy one message to each
destination?

Thanks, 
Yan










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