The new version of sendmail (version 8) includes a new configuration option which defines the version of the sendmail.cf file. This will allow older configuration files to be used with Version 8 sendmail. You can set the version level to values between 0 and 5. You can also define the vendor. Either Berkeley or Sun are valid vendor options. If the V option is not defined in the configuration file the default setting is V1/Sun. If a version level is specified but no vendor is defined, then Berkeley is the used as the default vendor setting. Table 3-8 lists some of the valid options.
Table 3-8 Configuration File Version Values| Field | Description | 
|---|---|
| V0/Sun | Do not use Solaris extensions for name service support. | 
| V1/Sun | Use Solaris extensions of name service support. This is the default setting. | 
| V1 | Use for older Berkeley configuration files. | 
| V5 | Use for new Berkeley configuration files which set $w to be the short hostname. | 
If Sun is defined as the vendor, then only V0 and V1 may be used to define the level.