Installing and Administering Internet Services

120 Chapter 4

Installing and Administering sendmail

Deciding Whether to Install sendmail

You must install sendmail in order to do the following things:

• Deliver mail to other machines using the SMTP protocol over a LAN

or WAN.

• Route X.400 mail using the X.400/9000 delivery agent.

• Route OpenMail or X.400 mail using the OpenMail product.

If you do not install sendmail, only local and UUCP mail will work.

HP-supported user agents (programs that send messages to sendmail)

and delivery agents (programs that sendmail uses to route messages)

are listed in the section “How sendmail Works” on page 135.

NOTE If you are running a pre-HP-UX 10.20 version of sendmail on your

HP-UX system, you cannot use the same /etc/mail/sendmail.cf

conﬁguration ﬁle with the version of sendmail included with HP-UX

10.20 and later. See the section “Migrating the sendmail Conﬁguration

File” on page 149 for information on how to migrate your pre-HP-UX

10.20 conﬁguration ﬁle.