<snip>
>
> The cyrus imap server has a filtering mechanism called "sieve".
> Since cyrus stores all messages in its own message store not
> relying on the unix filesystem for ownership and permissions it
> seems like it would work well for virtual users.
>
> HTH,
> -D
>
<snip>
Thanks for the suggestion. I did look into cyrus however I dismissed it
because it did not appear to support SQL databases, which almost all of
Postfix lookup tables can be read from.
If I knew more about the C programming language I would consider writing
either a patch to the virtual MDA of postfix to allow it do filtering or
write a completely difference MDA altogether.
I though of a couple of other ways I could maybe do this, but both have
major drawbacks.
1. Run the Mail server in a chroot, therefore with a different
/etc/passwd file for the virtual users.
2. Use the virtual MDA from Postfix but have the mail delivered to
temporary mailboxes. Then run a cron job to periodically check for
mail, filter it and deliver any remaining mail to the correct
mailbox. I believe procmail can have a home directory specfied on
its command line using the "-m" option. This would also allow
additional features such as auto-replies to be used.
Regards
Lee
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