The solution is simple and I have received over 20 mails to respond this
question.
Under your home directory to create a file call '.forward' and the content
is
another_user_at_another.domain.name
If you want to save a copy in current account, the content should be
my_account,another_user_at_another.domain.name
Thanks for those who gave me advise.
sarasin_at_yosemite.cop.dec.com
alan_at_nabeth.cxo.dec.com
colle_at_krtkg1.rug.ac.be
BRENNAN_at_HAL.HAHNEMANN.EDU
crossmd_at_heu538.ha.uk.sbphrd.com
comminc_at_iinet.net.au
SYSTEM_SF_at_unode2.nswc.navy.mil
win_at_tukan.ffb.eunet.de
SYSTEM_DJ_at_unode2.nswc.navy.mil
yanowitz_at_cs.umass.edu
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Received on Mon Jan 08 1996 - 16:01:32 NZDT