[Dovecot] sieve notify and lmtp

Hello,

i've setup sieve script which send notify to user (user@domain.com). But user@domain.com is alias user@domain.com and user@anotherdomain.com. LMTP delivers notification only to user@domain.com but not to user@anotherdomain.com. How to force send notification over smtp (which will be delivered to both) or i must use to=user@anotherdomain.com in notify ?

Thank you for your advices.

Lampa