How to inform outside users that domain soon will be closed ?

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How to inform outside users that domain soon wi...
\ o2 - Marcin Wasilewski (30 May 2007)
. \ KENNEDY VAN DAM Eric (30 May 2007)
. \ o2 - Marcin Wasilewski (30 May 2007)
. . \ mouss (30 May 2007)

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Subject:	How to inform outside users that domain soon will be closed ?
Group:	Postfix-users
From:	o2 - Marcin Wasilewski
Date:	30 May 2007

Hi,

I'm using postifx-2.1 for one domain and it's working well. Recently I
bought another domain and move all the users to that domain (separate mail
system, new email addresses), but some people outside still use old email
addresses to write emails to that users. Of course my users still have
possibility to check their old mailboxes.

I would like to close the old domain, but before that I'd like to inform
people (using postfix) outside for some time to start using new email
addresses for my domain or send an info that domain soon will be closed -
how can I do that?

Best regards

Marcin