aliaspostmaster, returnaddress, noreturnpersonal, returnpersonal, noreturnpersonal)
By default, the Postmaster return address used when PMDF constructs
bounce or notification messages is
postmaster@local-host, where
local-host is the official local host name (the
name on the local channel), and the Postmaster personal name is
"PMDF e-Mail Interconnect". Care should be taken in the
selection of the Postmaster address---an illegal selection may cause
rapid message looping and pile-ups of huge numbers of spurious error
messages.
The RETURN_ADDRESS and RETURN_PERSONAL PMDF options can be used to set
a PMDF system default for the Postmaster address and personal name. Or
if per channel controls are desired, the returnaddress and
returnpersonal channel keywords may be used.
returnaddress and returnpersonal each take a
required argument specifying the Postmaster address and Postmaster
personal name, respectively. noreturnaddress and
noreturnpersonal are the defaults and mean to use the
default values, either defaults established via the RETURN_ADDRESS and
RETURN_PERSONAL options, or the normal default values if such options
are not set.
If the aliaspostmaster keyword is placed on a channel,
then any messages addressed to the username "postmaster"
(lowercase, uppercase, or mixed case) at the official channel name will
be redirected to postmaster@local-host, where
local-host is the official local host name (the
name on the local channel). Note that Internet standards require that
any domain in the DNS that accepts mail have a valid postmaster account
that will receive mail. So this keyword can be useful when it is wished
to centralize postmaster responsibilities, rather than having separate
postmaster accounts for separate domains. That is, whereas
returnaddress controls what return postmaster address is
used when PMDF generates a notification message from the
postmaster, aliaspostmaster affects what PMDF does with
messages addressed to the postmaster.