This post will show how to setup an auto-reply message using vacation on a debian etch server running postfix. This should work in the same way using other email servers, but this was tested with postfix. I’ll assume that you have postfix already running properly on the server. The first step is to install the vacation package. Since vacation is available in etch we can install it just by running:
aptitude install vacation
and this will install vacation version 3.3.0 on the system

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Anyone coming from the “sendmail world” to postfix will notice immediately the care taken by postfix developers to make the transition as easy as possible. The same commands you would be used to, like for ex. mailq, newaliases, are working in postfix also.

The newaliases command works on postfix as expected, rebuilding the aliases database:
newaliases

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