Re: [courier-users] Maildrop: Direct delivery to IMAP folder

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Michael Nguyen writes:

> From: "Sam Varshavchik" <mrsam@courier-mta.com>
>> Michael Nguyen writes:
>
> [snip]
>
>> > Hmm.... Well, courier-authlib gets the info from a MySQL database. I
> guess
>> > I'm not sure how I could get authlib to transform
>> > michaeln+archive@twentyten.org into /var/mail/102309.macnt/.archive/ as
> the
>> > maildir.
>> >
>> > How would you do this, Sam?
>>
>> Well, that's what courier-authlib does: take a userid and return the
>> associated account information, such as the account's homedir/maildir.
>
> Sam, why do you hate me??! I've been loyal!
>
> Maybe I'm being unclear... So, michaeln@twentyten.org has a maildir of
> /var/mail/102309.macnt/...
>
> I want to be able to deliver to an arbitrary folder such that
> michaeln+anything@twentyten.org would be delivered to ${MAILDIR for
> michaeln@twentyten.org}/.anything
>
> Can you think of any way I can trick authlibmysql into returning something
> like that?

No. You said that you were using Postfix, and it's Postfix that runs the
logic to deliver <name+extra@domain> to the <name@domain>'s mailbox. This
logic belongs in Postfix.

For comparison's purposes, this is analogous to how Courier implements the
equivalent concept of <name-extension@domain>.

When Courier gets an address of <name-extension@domain>, it first tries to
look up the full address through authlib. If it does not exist, the
extension gets chopped off, and Courier tries again.

When a valid mailbox is found, whatever got chopped off is set aside, and
used to look up the .courier-extension file in the account's home directory
(falling back to .couried-default, etc.)

What you need to do is hack Postfix to put +anything part into some
environment variable, and deliver the message to user@domain; and its
..mailfilter can then import the +anything part from the environment, and
decide what to do with it.



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