Re: Qmail - any alternatives? (Was: Status of qmail?)

[Rob Browning <rlb@cs.utexas.edu>]

Jeff Noxon <jeff@planetfall.com> writes:

> I currently run qmail, and due to its licensing problems I'd rather not
> run it.  But is there another MTA that supports multiple user aliases
> similar to the way qmail does?  I find it tremendously useful to be able
> to have multiple jeff-xyz addresses for mailing list subscriptions and
> so on.

Exim will, and it looks pretty easy to setup and flexible to use:

Multiple user mailboxes
***********************

The wildcard facility of the generic `prefix' and `suffix' options for
directors allows you to configure Exim to permit users to make use of
arbitrary local part prefixes or suffixes in any way they wish.  A
director such as

     userforward:
       driver = forwardfile
       file = .forward
       suffix = -*
       suffix_optional
       filter

runs a user's `.forward' file for all local parts of the form
"username-*".  Within the filter file the user can distinguish
different cases by testing the variable `$local_part_suffix'. For
example:

     if $local_part_suffix contains -special then
       save /home/$local_part/Mail/special
     endif

If the filter file does not exist, or does not deal with such
addresses, they fall through to subsequent directors, and, assuming no
subsequent use of the `suffix' option is made, they presumably fail.
Thus users have control over what suffixes are valid.

Alternatively, a suffix can be used to trigger the use of a different
`.forward' file - which is the way a similar facility is implemented in
another MTA:

     userforward:
       driver = forwardfile
       file = .forward${local_part_suffix}
       suffix = -*
       suffix_optional
       filter

If there is no suffix, `.forward' is used; if the suffix is "-special",
for example, then `.forward-special' is used. Once again, if the
appropriate file

does not exist, or does not deal with the address, it is passed on to
subsequent directors, which could, if required, look for an unqualified
`.forward' file to use as a default.

-- 
Rob Browning <rlb@cs.utexas.edu> PGP=E80E0D04F521A094 532B97F5D64E3930


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