sieve/vacation From line?

[Pat Lashley]

--On Thursday, October 23, 2003 15:35:08 -0400 andrew.caird at fccc.edu wrote:

> On Thu, 23 Oct 2003, Pat Lashley wrote:
>> --On Thursday, October 23, 2003 14:53:38 -0400 andrew.caird at fccc.edu
>> wrote:
>>
>> I'm not sure how the vacation functionality is implemented; but if it
>> goes through your normal MTA instead of attempting a direct SMTP
>> connection; then you should be able to have your MTA rewrite the From
>> address on the way out.  This is fairly trivial with exim; I'm not sure
>> how hard it would be with other MTAs.
>
> We use sendmail, and we could re-write the outgoing addresses, but it's
> not easy, and it involves either (a) another flat file of mappings to
> maintain or (b) another LDAP lookup (and I'm not sure that's even
> possible); either way it's hard.  Perhaps it's time to switch to exim? :)

Ease and flexability of configuration was the major reason I switched
to Exim several years ago.  I've never had cause to regret it.  (It has
several other advantages too.  The recent versions have ACL sections
that can be used to reject messages while the SMTP connection is still
open.  That reduces the chances that you'll be stuck with a queue full
of undeliverable bounce messages aimed at forged addresses.  The exiscan-acl
patch from http://duncanthrax.net/exiscan-acl makes it easy to integrate
SpamAssassin and/or virus checking at ACL time.)

With Exim, you would still need a lookup for the rewrite; but it makes
such lookups quite easy.  I assume that you already have some sort of
database that has the full.name -> mailbox translations.  (I'm guessing
LDAP from your messages.)  Depending on your schema, you may be able
to easily do the reverse lookup in the same database.  If not, you'd
need a script to create a new database or table with the reverse info;
and to update it whenever the existing db is updated.  I don't think
there's any way around that with any MTA; other than exposing the mailbox
names as you mentioned earlier.



-Pat