Hi,

I have two scenarii where I would like to know how an e-mail address
delivers. One of those scenarii is:

I extract e-mail address from various databases for the various
services of our system (ranging from the USENET news server to
fax to e-mail gateway) then create a (Mailman) mailing-list with it.
Unfortunately, some of the users (including me) receive quite
a bit of duplicates.

It could be handy to be able to remove duplicates from that
list, e.g. by knowing what e-mail address it ultimately delivers
to.

For example, on my big list I have:

ad...@some-domain.ch
admi...@alphanet.ch
www...@alphanet.ch
fax...@alphanet.ch
pbxad...@alphanet.ch

they all get ultimately (through /etc/aliases, vmailbox, .forward)
to \schaefer.

sendmail -bv helps:

However, it is not easily usable in a script AFAIK.

shakotay:/home/schaefer# sendmail -bv pbxad...@alphanet.ch
Mail Delivery Status Report will be mailed to <root>.

which then gives (among others):

<schae...@alphanet.ch> (expanded from <pbxad...@alphanet.ch>): delivery via
    local: delivers to file: /home/schaefer/Mail/mail.received

That "schae...@alphanet.ch" is the info I need.

Is there anyway to do that, either through an installed shell command
(Version: 2.7.1-1+squeeze1 or even a later version), or through an
API ?

Or does the multi-threaded very confined approach of Postfix makes this
impossible ?  In that case I could resort to heuristics, parsing
/etc/aliases, /etc/postfix/* myself.

Thank you for any input!


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