[Spam-discuss] Re: USERNAME- support in exim

[Mark H. Weaver]

"Bradley M. Kuhn" <address@hidden> wrote:
> Mark,
> 
> You mentioned at the last SPAM meeting that you had a solution in exim to
> make USERNAME- work properly (like qmail does it).  Could you post that
> to the spam-discuss list?

Here is the relevant section from the exim.conf file of netris.org's
mail server:

> userforward:
>   driver = forwardfile
>   suffix = -*
>   suffix_optional
>   check_ancestor
>   file = .forward${local_part_suffix}
>   errors_to = address@hidden
>   syntax_errors_to = address@hidden
>   filter

In my case, I use "-" as the separator, and it only works in the
restricted case of <username>-<suffix>@netris.org, when there is a
~<username>/.forward-<suffix> file.  However, the "suffix" and
"suffix_optional" options can be used for other directors as well.

Note also the use of the "${local_part_suffix}" and "${local_part}
variables.  Keep in mind that the "${local_part}" variable only
expands to the part before the first "-".  To be safe, we should
search the exim.conf file for all usages of "${local_part}", and in
each case think about whether "${local_part_suffix}" should be added
there.  We should also test the use of suffixes with each director, to
make sure it does the right thing, before rolling this into place.

       Mark