Installing and Administering Internet Services

Chapter 4 121

Installing and Administering sendmail

Installing sendmail

When you install sendmail, the installation script creates and modiﬁes

ﬁles on the system that are needed for sendmail operation. The

sendmail conﬁguration ﬁle supplied with HP-UX 11.0 will work without

modiﬁcations for most installations. Therefore, the only steps you must

do are: set up sendmail servers to run with NFS, conﬁgure and start

sendmail clients, and verify that sendmail is running properly.

This section contains information about the following tasks:

• “Installing sendmail on a Standalone System” on page 121

• “Installing sendmail on a Mail Server” on page 122

• “Installing sendmail on a Mail Client” on page 123

• “Verifying Your sendmail Installation” on page 125

NOTE HP recommends that you use sendmail with the BIND name server.

The BIND name server should have an MX record for every host in the

domain(s) that it serves. For more information on how sendmail uses MX

records, see “MX Records” on page 139.

Installing sendmail on a Standalone System

When sendmail is installed, it is automatically conﬁgured to send and

receive mail for users on the local system only. The standalone system

processes all outbound mail and establishes connections to the message

destination host or to Mail Exchanger (MX) hosts (see “MX Records” on

page 139 for more information). The sendmail daemon is then started

when you reboot the system, so you do not need to make any changes to

any system ﬁles.

The sendmail installation script makes the following conﬁguration

changes:

• Sets the SENDMAIL_SERVER variable in the

/etc/rc.config.d/mailservs ﬁle to 1. This ensures that the

sendmail daemon is started whenever you reboot your system or run

the sendmail startup script.