Installing and Administering Internet Services

206 Chapter4

Installing and Administering sendmail

Turning off Virtual Interfaces

You can disable the ability to include all the interface names in the $=w

macro on startup. Turning off virtual interfaces speeds up start up

process. However, if you turn virtual interfaces off, mail sent to those

addresses will bounce back to the sender.

To turn of Virtual Interfaces, do the following:

• Open the sendmail.cf ﬁle.

• Uncomment the line “DontProbeInterfaces.”

By default, virtual interfaces are included in the $=w macro, which is

deﬁned in the sendmail.cf ﬁle. Sendmail searches for them at start up.