[exim] Filter rule for forward account in group

Hello,

I have problem with rule filter email. I have 4 email account:
tk1@???
tk2@???
tk3@???
tk4@???

With email account tk1@???, I created rule filter:
if
$header_to: is "tk1@???"
then
deliver "tk2@???"
deliver "tk3@???"
deliver "tk4@???"
endif

This rule apply for tk1@???. I use abc@??? send message to
tk1@??? then everything ok. tk2@???, tk3@???,
tk4@??? a message sent by
abc@???.

Problem is when I use tk4@??? or tk3@??? or tk2@??? and send
message to tk1@??? then tk4@??? not received a message sent by
tk4@???.

Anyone know this situation ? Please help me. Sorry for my bad english.

Thanks!