Host a Domino and SMTP server on the same iSeries server

If you are running Domino^® and Simple Mail Transfer Protocol (SMTP) on the same iSeries™ server, it is recommended that you configure each one to bind to a specific IP address. This topic provides the steps for configuring the SMTP server to use a specific Internet address.

When hosting Domino and SMTP server on the same iSeries server, you should bind each server to an IP address. Mail is then sent to users of Domino or SMTP using the appropriate IP address and although it shares a port, the mail is only handled by the server for which it is intended.

To force the SMTP server to use a specific Internet address for iSeries servers running OS/400^® V5R1 or later or running i5/OS™ V5R3 or later, follow these steps:

In iSeries Navigator, select your iSeries Server > Network > Servers > TCP/IP.
Right-click SMTP and select Properties.
Click the Bindings tab.
Select the Use all interfaces radio button, to bind all interfaces to port 25.
Select the Select an interface radio button, to specify the client and server bound interfaces that you would like to bind.
Note: If you want to use network address translation (NAT) either on iSeries server or on your firewall, you must force the iSeries SMTP client to use one specific Internet address.
Click OK.

To force the SMTP server to use a specific Internet address, for iSeries servers running OS/400 V5R1 or earlier, follow these steps:

In the iSeries character-based interface, type: CRTDTAARA DTAARA(QUSRSYS/QTMSSBNDIP) TYPE(*CHAR) LEN(16) VALUE('Internet address') AUT(*USE) This creates a data area that contains the specific Internet address.
Stop and start the SMTP server. In the character-based interface, type: ENDTCPSVR *SMTP
Type: STRTCPSVR *SMTP

To force the SMTP client to use a specific Internet address, before OS/400 V5R1, follow the same steps, except in step 1 create the data area: DTAARA(QUSRSYS/QTMSCBNDIP)

Now SMTP receives only mail that is addressed to this Internet address. Check the Domain Name System (DNS) server, local host table, and system distribution directory to ensure that this forced Internet address is present.

Refer to the Domino reference library for instructions on how to bind Domino SMTP to a specific TCP/IP address.