Building the sendmail.cf Configuration File
How to Build a New sendmail.cf File shows you how to build the configuration file. Although you can still use
older versions of sendmail.cf files, the best practice is to use the new format.
For more details, refer to the following.
How to Build a New sendmail.cf File
The following procedure shows you how to build a new configuration file.
Note - /usr/lib/mail/cf/main-v7sun.mc is now /etc/mail/cf/cf/main.mc.
- Become superuser or assume an equivalent role.
Roles contain authorizations and privileged commands. For more information about roles, see Configuring RBAC (Task Map) in System Administration Guide: Security Services.
To configure a role with the Primary Administrator profile, see Chapter 2, Working With the Solaris Management Console (Tasks), in System Administration Guide: Basic Administration.
- Stop sendmail.
# svcadm -t disable network/smtp:sendmail
- Make a copy of the configuration files that you are changing.
# cd /etc/mail/cf/cf
# cp sendmail.mc myhost.mc
Select a new name for your .mc file.
- Edit the new configuration files (for example, myhost.mc), as necessary.
For example, add the following command line to enable domain masquerading.
# cat myhost.mc
Use the desired host name and domain name.
In this example, MASQUERADE_AS causes sent mail to be labeled as originating from
host.domain, rather than $j.
- Build the configuration file by using m4.
# /usr/ccs/bin/make myhost.cf
- Test the new configuration file by using the -C option to specify the new file.
# /usr/lib/sendmail -C myhost.cf -v testaddr </dev/null
While this command displays messages, it sends a message to testaddr. Only outgoing mail
can be tested without restarting the sendmail service on the system. For systems that
are not handling mail yet, use the full testing procedure in How to Test the Mail Configuration.
- Install the new configuration file after making a copy of the original.
# cp /etc/mail/sendmail.cf /etc/mail/sendmail.cf.save
# cp myhost.cf /etc/mail/sendmail.cf
- Restart the sendmail service.
# svcadm enable network/smtp:sendmail