Testing How Addresses Are Rewritten (Part 2):
Next, run sendmail -bt with the -C option to use the newly created test.cf configuration file. The –C
option permits you to specify the sendmail configuration file on the command line. the following listing shows
this test.
# sendmail -bt -Ctest.cf
ADDRESS TEST MODE (ruleset 3 NOT automatically invoked)
Enter <ruleset> <address>
> /tryflags HS
> /try smtp craig
Trying header sender address craig for mailer esmtp
canonify |
input: |
craig |
|
Canonify2 |
input: |
craig |
|
Canonify2 |
returns: |
craig |
|
canonify |
returns: |
craig |
|
1 |
input: |
craig |
|
1 |
returns: |
craig |
|
HdrFromSMTP |
input: |
craig |
|
PseudoToReal |
input: |
craig |
|
PseudoToReal |
returns: |
craig |
|
MasqSMTP |
input: |
craig |
|
MasqSMTP |
returns: |
craig |
< @ *LOCAL* > |
MasqHdr |
input: |
craig |
< @ *LOCAL* > |
MasqHdr |
returns: |
craig |
< @ parrot . foobirds . org . > |
HdrFromSMTP |
returns: |
craig |
< @ parrot . foobirds . org . > |
final |
input: |
craig |
< @ parrot . foobirds . org . > |
final |
returns: |
craig |
@ parrot . foobirds . org |
Rcode = 0, addr = craig@foobirds.org
> /quitRunning sendmail –bt –Ctest.cf starts sendmail in test mode, and tells it to use the new
configuration that is stored in test.cf. The test in the previous listing shows that the value entered in the M
macro is used to rewrite the sender address in the message header. You know this because the
address returned from ruleset final is now craig@foobirds.org, which is just what you want.
Run additional tests (for example, /try esmtp kathy@robin.foobirds.org) to see if client addresses
are rewritten correctly. When you're confident that the configuration is correct and reliable, move the
test.cf configuration file to sendmail.cf to make the new configuration available to sendmail.
If you are called upon to help someone configure sendmail on a system that doesn't already have
the m4 source file installed, it may be easier to directly edit the sendmail.cf file, but only if the
change is very small. If you can avoid it, don't make changes directly to the sendmail.cf file. If you
really want to make major sendmail configuration changes, use m4 to build your configuration.