Bug#439983: exim4: /var/www/Maildir?

[Andreas Metzler]

On 2007-08-29 Olaf van der Spek <olafvdspek at gmail.com> wrote:
> Package: exim4
> Version: 4.63-17
> Severity: normal

> Hi,

> Exim4 created /var/www/Maildir, I don't think this is desirable.
> /var/www was created by Lighttpd.
[...]

Hello,
There is not really a completely proper fix for that. This happened
because you received mail for www-data at localhost. www-data has
/var/www as homedirectory and the mail is not redirected somewhere
else in /etc/aliases.

Exim could be configured to generally not deliver to system accounts
and indeed the Debian packages are prepared for that since 4.67-3.
Setting
FIRST_USER_ACCOUNT_UID = 1000
would stop exim from accepting (an delivering) mail to any system
accounts from remote hosts unless they are redirected by /etc/aliases
(or a special router).[1]

However discussion on debian-devel has revealed that there are some
scenarios that would break horribly and therefore was not made
default.

cu andreas