The final step in creating the
hub mail delivery agent
definition is to fill in its missing
Edit the client.cf file again and add the new parts shown below
# Delivery agent definition to forward mail to hub Mhub, P=[IPC],
S=0, R=0, F=mDFMuXa,
T=DNS/RFC822/SMTP, A=IPC $h new new new new
R= equates are given a value of zero.
S= equate specifies the sender-rewriting rule set.
R= equate specifies the recipient-rewriting rule set.
Because there are no
rule sets yet, these equates are set to zero. You will be
giving them real rule-set numbers when we begin to cover rule
The flags listed in the
F=mDFMuXa equate of the
definition are typical of those generally used in
delivery agent definitions. You may want to change these depending on
your needs. All the available flags are listed in
Chapter 30. The ones we selected are summarized in
|m||This agent can deliver to more than one user at a time.|
|D||Include a |
|F||Include a |
|M||Include a |
|u||Preserve the case of the recipient name.|
|X||Pass lone dots on a line by doubling them.|
|a||Run extended SMTP protocol|
The mailer delivery agent definitions are now roughed out.
Remember that the symbolic name (
is the only part of these definitions that will be referenced
in later rule sets.
Also notice that the last equate of each definition, the
A= command-line equate, ends with a macro (
We cover macros in the next chapter.