Kerstin Espey wrote:
Exim 4.x does not act this way, but Exim 3.x did. If you don't make specific provisions to supply Cyrus a lowercase local part using Exim 4.x, the messages won't get delivered.
As long as you don't use the option "caseful_local_part" in the exim router, exim will send all mails to the lowercase mailbox.
Regards,
Kerstin