On Thu, Oct 17, 2024 at 12:18:54 +0200, Matus UHLAR - fantomas via
Postfix-users wrote:
> > On Tue, Oct 15, 2024 at 16:03:13 +0100, Paul Fowler via Postfix-users wrote:
> > > Are there best practices for avoid OS username enumeration on a mail
> > > relay?
>
> On 16.10.24 23:54, Geert Hendrickx via Postfix-users wrote:
> > Just set local_recipient_maps appropriately, without unix:passwd.byname if
> > you
> > don't need it.
> >
> - but mail recipient enumeration is still possible.
Oh, ok. I thought you wanted to avoid enumeration of local OS usernames
that could reveal installed applications (like chrony, named, apache, ...),
not of *actual* mail repicients.
Geert
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