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Compile and Install sendmail
Next: 18.7 Pitfalls

18.6 Install sendmail

There are two approaches to installing a new sendmail:

After you have compiled sendmail (and if the configuration file is ready and tested), you can install it as your production version. If you are already running a sendmail and will be overwriting that binary, you will need to kill that version first (see Chapter 4, How to Run sendmail).

To install sendmail, first type

# ./makesendmail -n install

You use -n to be sure that the installation caused by the Makefile is in fact correct for your site. A typical such run, for example, might look like this:

install -o root -g kmem -m 6555 sendmail /usr/lib
for i in /usr/ucb/newaliases /usr/ucb/mailq; do rm -f $i; \
    ln -s /usr/lib/sendmail $i;
install -c -o root -g kmem -m 644 /dev/null \
install -c -o root -g kmem -m 444 sendmail.hf /usr/lib

Notice that Makefile will not create the queue directory even if it does not exist. If you have never run sendmail on your machine before, you will need to create that queue directory:

# mkdir /var/spool/mqueue
# chmod 700 /var/spool/mqueue

See Section 34.8.48, QueueDirectory (Q) for a description of the QueueDirectory option and information about how sendmail locates its queue directory.

If all looks good, you can install sendmail with this command:

# ./makesendmail install

But be aware that the new sendmail may not work properly with your old configuration file. See Chapter 19 for guidance in creating configuration files.

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