Joel Reicher:
> The mailbox transport I use is a pipe to an MDA that treats the username
> case-sensitively, so I have given the "u" flag in the transport, but
> I also have
>
> recipient_delimiter = +
>
> and the address extensions are being downcased as well.
Postfix behaves as documented: the pipe(8) "u" option folds the
entire localpart.
If you want additional controls for user and extension, then you are
welcome to draft an implementation. It is mostly a matter of cloning
existing code and documentation, plus invoking split_addr()
appropriately.
Wietse
