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nosvw137.arj
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POP
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1991-09-18
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=== NOSview [137]
pop
===
The Post Office Protocol (POP2), as defined in RFC 937, is a mail
protocol designed for use in networks containing hosts that are
normally turned off when they are not in use. In this
environment it is not possible for an SMTP mail server to deliver
mail to these hosts because they are not always available.
The solution to this problem is to designate a mailbox server
that is available to the network at all times and can accept SMTP
mail for other hosts. When a host comes on-line it uses POP2 to
access the mail in its mailbox(es) on the mailbox server.
The advantage of using a POP server at an area mail gateway is
that when mail arrives at the gateway for a station that may not
be available, the gateway does not have to waste time trying to
establish a connection with that station. Instead it accepts the
mail and places it in the addressee's mailbox, just as if the
addressee were a normal user on the gateway system (that is, this
is the same thing that is done with AX.25 BBSs).
The POP server requires one data file called POPUSERS. See
NOSfiles\POPUSERS for an example of this file.
POP2 is very simple protocol, with minimal error handling. When
an error is encountered, an error message is generated and then
the connection is terminated. You then have to re-establish a
connection to continue.
_________________________________________________________________
pop kick
_________________________________________________________________
Kick the local POP client, to get mail from the server.
_________________________________________________________________
pop mailbox [<name>]
_________________________________________________________________
Display or set the name of the local mailbox that is to hold all
of the mail received from the POP server.
Note that this mailbox <name>, like all DOS filenames, is limited
to eight characters. Also, <name> does NOT include a DOS path;
all mail is placed in N:\SPOOL\MAIL, along with other mail placed
there by SMTP.
>> Example: pop mailbox sysop
The POP client does not write directly to the user's mailbox.
Instead it creates a file MBOX.POP in the current directory and
places all of the mail it receives in that file. On completion
it appends the contents of the file to the end of the mailbox
when all mail has been collected from the mailbox server.
Normally this file is deleted after its contents have been
transferred to the mailbox. However, if the POP client is unable
to access the mailbox (for example, if it is locked by SMTP),
then MBOX.POP will remain in existence. Any new mail gathered by
the POP client will be appended to the end of MBOX.POP. Then
eventually when the mailbox becomes available the contents of
MBOX.POP will be transferred to it.
_________________________________________________________________
pop mailhost [<host>]
_________________________________________________________________
Display or set the the POP server host.
>> Example: pop mailhost ns9mai
_________________________________________________________________
pop quiet [on|off] Default: off
_________________________________________________________________
Display or set the POP quiet flag.
This flag determines whether the bell sounds when the system
announces that incoming mail has arrived. When quiet is set to
'off' you hear the bell.
>> Example: pop quiet on
_________________________________________________________________
pop timer [<seconds>] Default: 0
_________________________________________________________________
Display or set the POP polling interval. The local client will
then poll the server for mail at the specified interval.
>> Example: pop timer 600
_________________________________________________________________
pop userdata [<name> <password>]
_________________________________________________________________
Display or set the user data required by the POP server to
validate the client's mail request.
Note that <name> and <password> are case sensitive.
When only 'pop userdata' is entered to show the values, only the
<name> is shown.
>> Example: pop userdata Mary POPpins [..... groan!!!]