Internet Express for Tru64 UNIX Version 6.8 Administration Guide (14233)

Note:
You must specify an entry in the Masquerading Hosts/Domains List field if you intend to
exclude host aliases from masquerading (see step 8) or if you want to enable masquerading
for subdomains (see step 9). You must specify to Sendmail the hosts and domains you want
to masquerade (since the local host name and local aliases will be excluded).
4. If you have a file containing the names of hosts and/or domains that you would like to
assume the masquerading host name, enter the full pathname of that file in the Masquerading
Hosts/Domains File field. In Figure 5-1, the file /mydir/masked-hosts.txt contains
additional host and domain names to be masqueraded, each on a separate line, as shown
in the following example:
host1.site.domain.com
host2.site.domain.com
host3.site.domain.com
You can specify only one file in the Masquerading Hosts/Domains File field.
5. To prevent the masquerading host name from appearing in the mail header of messages
from particular users, enter those user names in the Excluded Users List field. Separate the
names using a space. In Figure 5-1, mail messages from the users julia, sarah, and
barbara will not use the masquerading host name.
6. If you have a file containing the names of users whose mail headers should not use the
masquerading host name, enter the full pathname of this file in the Excluded Users File field.
Each user name must occupy a separate line in the file, as shown in the following example:
admin
peter
vpr
rich
You can specify only one file in the Excluded Users File field.
Notes:
If a user listed in the Excluded Users List field or contained in the file specified in the
Excluded Users File field sends mail to a local user, the sending user's name will be
masqueraded.
7. To use the masquerading host name in all recipients' addresses, check Use Masquerading
Hostname in Recipient Addresses. (Recipient addresses include those on the To: and Cc:
lines in the message header.)
8. To exclude your system's host aliases from masquerading, check Exclude Host Aliases From
Masquerading. When this item is checked, only the host and domain names specified in
Masquerading Hosts/Domains List and in the file specified by Masquerading Hosts/Domains
File will be masqueraded.
9. If you want hosts and subdomains within the domains specified in the Masquerading
Hosts/Domains List and Masquerading Hosts/Domains File fields to assume the
masquerading host name, check Enable Masquerading for Subdomains. For example, in
Figure 5-1, mail from server.xyzcorp.com (a host within the xyzcorp.com domain)
will assume the xyzcorp.com masquerading host name.
5.1 Sendmail Server Administration 103