[BUGS] question regrading postfix

[goku -]

Hi all, this is my problem.
just installed postfix on a freebsd 7 box.

I went in to the main.cf file to make the necessary changes.

when sending out emails I would like it to show jon at abc.net.  but when I
email my friends it shows jon at mail.abc.com.  I tried looking for information
on the net but the instructions I see says to do it like the way I did it.
can someone help?
thanks

# INTERNET HOST AND DOMAIN NAMES
#
# The myhostname parameter specifies the internet hostname of this
# mail system. The default is to use the fully-qualified domain name
# from gethostname(). $myhostname is used as a default value for many
# other configuration parameters.
#
#myhostname = host.domain.tld
#myhostname = virtual.domain.tld

myhostname = mail.abc.com

# The mydomain parameter specifies the local internet domain name.
# The default is to use $myhostname minus the first component.
# $mydomain is used as a default value for many other configuration
# parameters.
#
#mydomain = domain.tld

mydomain = abc.com


# SENDING MAIL
#
# The myorigin parameter specifies the domain that locally-posted
# mail appears to come from. The default is to append $myhostname,
# which is fine for small sites.  If you run a domain with multiple
# machines, you should (1) change this to $mydomain and (2) set up
# a domain-wide alias database that aliases each user to
# user at that.users.mailhost.
#
# For the sake of consistency between sender and recipient addresses,
# myorigin also specifies the default domain name that is appended
# to recipient addresses that have no @domain part.
#
#myorigin = $myhostname
#myorigin = $mydomain

myorigin = abc.com
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