On Feb 28, 2007, at 12:38 PM, Troy Engel wrote:

Rich, Whidbey Telecom wrote:

...

However, the case-sensitive nature of our ext3 filesystem means
that a message destined to "topic" won't deliver to a user's
"Topic" folder. For example, if a user creates a "Topic" folder,
and gives "user+Topic@domain.com" to a web form that lower-cases
it, delivery is deferred.

While way off topic in this list, why not just do this via the Exim
filtering? I'll make two assumptions:

• the user has created a folder called 'Topic', knowing they will
  subscribe to a webform using "user+toPiC" (example)

• you employ local_part_suffix options in your 'userforward' router:

  local_part_suffix = +* : -* local_part_suffix_optional

Exim filtering will disregard case if the testing condition is
lowercase, but regard it if it's upper case. A pseudo filter (going
off the top of my head) for a user might look like:

if $local_part_suffix is "+Topic" then deliver ${home}/Maildir/.Topic/ finish endif

"is" means 'Topic' will be matched without case; "IS" will try and
match with case sensitivity.

It doesn't make sense to me to patch Dovecot (which would be
difficult to maintain unless it's accepted upstream) when you
should probably could do what you want via Exim's super-powerful
lingo.

Thanks Troy. That looks like it'd work, but only if you pre- determined which folders users could have. We don't know the folder
names, so "$local_part_suffix is $local_part_suffix" wouldn't really
work.

We posted to the Exim list as well, but so far it seems no one's
tried to do this before.

Rich