David J. Weller-Fahy:
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> * Noel Jones <njo...@megan.vbhcs.org> [2012-09-10 23:23 -0400]:
> > On 9/10/2012 9:20 PM, David J. Weller-Fahy wrote:
> > > 1) Am I correct that blocking recipient addresses which consist of
> > > an existing user with an extension not defined by that user (in a
> > > .forward-extension file) is not possible using Postfix using just
> > > the configuration options available in main.cf?
Even if the local delivery agent rejected non-existent extensions,
Postfix would still have to stop "invalid" addresses at the SMTP
daemon to avoid becoming a backscatter source.
Therefore, YOU provide an SMTP server access table, or perhaps
better, a local_recipient_maps table that returns "notfound" for
all the addresses that are invalid.
The SMTP daemon does not know what address extensions do or don't
match a user's .forward files. It does not grope around in user's
home directories.
Wietse
