Recently found this article in Kayako website, I will tell how it works for me
http://forums.kayako.com/showthread.php?p=17755#post17755
http://forums.kayako.com/showthread.php?p=17755#post17755
Webcart said:That solved the duplicates problem, but introduced a new one:
e-mails sent to forwarders generate bounce mail (Mail delivery failed: returning message to sender). Please advise.
Thank you.
Przemek said:You can solve "mail delivery failed" messages by creating a mailbox with the same name as forwarder.