Technical data

Configuring and Managing the POP Server
18.1 Key Concepts
• TRANSFORM
The POP server attempts to translate the DECnet node name to a TCP/IP
host name. If the name can be translated, the POP server checks to see
whether the translated host name is local. If so, the From: header becomes
an address in the form user@substitute-domain. If not, the From: header
becomes an address in the form user@hostname. Note that the POP and
SMTP servers call the same routine to determine if a host name is local.
The following examples show some ways the POP server translates DECnet
node names to TCP/IP node names. In these examples:
The local host name is orders.acme.widgets.com
ORDERS translates to "orders.acme.widgets.com"
* The message header From: ORDERS::J_SMITH becomes:
From: [e-mail]
* For a substitute domain of acme.widgets.com , the message header
From: ORDERS::J_SMITH becomes:
From: [e-mail]
* If HOST12 translates to host12.acme.widgets.com , which is not
local on orders.acme.widgets.com , the message header From:
HOST12::J_JONES
becomes:
From: [e-mail]
* If HOST13 does not translate and host orders.acme.widgets.com
has no substitute domain defined, the message header From:
HOST13::J_JONES
becomes:
From: "HOST13::J_JONES"@orders.acme.widgets.com
18.1.6.1.3 User Name-Only Address If an SMTP substitute domain is defined,
the POP server appends it to the user name, followed by a commercial at sign (@).
Otherwise, POP uses the local host name.
For example, with a substitute domain defined as acme.widgets.com , the message
header From: Smith becomes:
From: [e-mail]
18.1.6.1.4 DECnet Address That Contains Quotation Marks The values
assigned to the TCPIP$POP_QUOTED_DECNET_REWRITE logical name define
how the POP server rebuilds a DECnet address that contains quotation marks.
The values are:
• GENERIC
The address is changed to the SMTP format. For example,
on host widgets.xyzcorp.com , the message header From:
ORDERS::"[e-mail]"
becomes:
From: "ORDER::\"[e-mail]\""@widgets.xyzcorp.com
• NONE
The From: line is passed to the POP client without being modified. For
example:
From: ORDERS::"[e-mail]"
18–6 Configuring and Managing the POP Server