Sendmail Error on OS X Mountain Lion

I get an error when trying to run sendmail. I am on OS X 10.8 Mountain Lion.

sendmail: fatal: chdir /Library/Server/Mail/Data/spool: No such file or directory

Just execute in terminal

sudo mkdir -p /Library/Server/Mail/Data/spool
sudo /usr/sbin/postfix set-permissions
sudo /usr/sbin/postfix start

That did the trick for me.

In order to get rid of all warnings I had to do the following:

sudo mkdir -p /Library/Server/Mail/Data/spool
sudo gzip /usr/share/man/man1/{postalias.1,postcat.1,postconf.1,postdrop.1,postfix.1,postkick.1,postlock.1,postlog.1,postmap.1,postmulti.1,postqueue.1,postsuper.1,sendmail.1}
sudo gzip /usr/share/man/man5/{access.5,aliases.5,bounce.5,canonical.5,cidr_table.5,generic.5,header_checks.5,ldap_table.5,master.5,mysql_table.5,nisplus_table.5,pcre_table.5,pgsql_table.5,postconf.5,postfix-wrapper.5,regexp_table.5,relocated.5,tcp_table.5,transport.5,virtual.5}
sudo gzip /usr/share/man/man8/{anvil.8,bounce.8,cleanup.8,discard.8,error.8,flush.8,local.8,master.8,oqmgr.8,pickup.8,pipe.8,proxymap.8,qmgr.8,qmqpd.8,scache.8,showq.8,smtp.8,smtpd.8,spawn.8,tlsmgr.8,trivial-rewrite.8,verify.8,virtual.8}
sudo /usr/sbin/postfix set-permissions
sudo chmod 700 /Library/Server/Mail/Data/mta
sudo /usr/sbin/postfix start

The solution appears to also fix an error in 10.8 where the fax service has stopped sending emails after the 10.8 upgrade.