HP-UX Mailing Services Administrator's Guide

Configuring and Administering Sendmail
Turning Off Virtual Interfaces
Chapter 292
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 the startup
process. However, if you turn virtual interfaces off, mail sent to those
addresses will bounce back to the sender.
To turn off virtual interfaces, do the following:
1. Open the sendmail.cf file.
2. 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 during
startup.
The host name is added to class w for the names of all interfaces unless
the DontProbeInterfaces option is set. This is useful for sending mail
to hosts, which have dynamically assigned names.