TCP/IP Configuration and Management Manual

Configuring the NonStop TCP/IP Subsystem

TCP/IP Configuration and Management Manual—427132-004

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Simple Mail Transfer Protocol (SMTP)

The Simple Mail Transfer Protocol (SMTP, RFC 821 and RFC 1495) gateway

implements the SMTP on NonStop systems running Guardian. The SMTP gateway

uses the sockets interface to establish connection with Internet hosts. It provides an

interface between TRANSFER mail systems and the TCPIP process.

The SMTP processes (SMTPRCV and SMTPSND), first open the TISERV (Transfer

Process) (specify up to five TISERV process names). The SMTP processes starts a

session with TRANSFER by logging in as the SMTP MAIL gateway correspondent

(SMTPGATE). Once the processes log into TRANSFER, they can make requests to

TRANSFER to store, retrieve, or delete messages. Specify the mail correspondent

name and password in the SMTPCONF file, as described Option processing—O on

page 3-51.

The default location for the SMTPCONF file is $SYSTEM.ZTCPIP.SMTPCONF;

however, the SMTPSND and SMTPRCV programs can be given the -C option to use a

different location for SMTPCONF.

The SMTPRCV process, which handles mail arriving from the network, is started by

the LISTNER process. The LISTNER process listens for incoming service requests on

well-known ports. The well-known port number for SMTP services is TCP port 25. This

is set up in the PORTCONF configuration file for the LISTNER process by adding an

entry for SMTP.

The SMTPSND process is started by the system administrator as part of the NonStop

TCP/IP startup mechanism. This process can be run from TACL.

Setting Up SMTP

To set up the SMTP gateway (SMTPGATE), do the following:

1. Edit a copy of the supplied SMTPCONF file to make the required changes. Refer

to Setting Up the Configuration File

, later in this section, for detailed instructions on

making these changes.

2. Set up an entry for the SMTPRCV in the file $SYSTEM.ZTCPIP.PORTCONF for

the LISTNER process, as follows:

SMTP $SYSTEM.ZTCPIP.SMTPRCV

If you are using a different location for SMTPCONF (other than

$SYSTEM.ZTCPIP.SMTPCONF), then the entry in the PORTCONF file needs to

be as follows:

SMTP $SYSTEM.SYSTEM.SMTPRCV -Cconfiguration-file

Note. The -C syntax for SMTPRCV differs from the -C syntax for SMTPSND; do not enter

a space between -C and

configuration-file for SMTPRCV.