Hi Lukasz,
that's a classical postfix thing - change your
virtual_mailbox_transport to "cyrus:127.0.0.1" or something similar
(you apparently just use "cyrus" or equivalent) - the syntax is
<transport name as givenin master.cf>:<host>:<port> or <transport>:<any
other destination> (depending on what arguments the transport needs) -
see man transport(5).
Baltasar
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