[EC2] FC4でのメール設定

MTAをPostfixに変えたかっただけなのにえらい手間取った。。
alternativesという仕組みが採用されているんですね(FCユーザには当たり前？)。

[tf0054@domU-xx-31-33-00-03-A8 alternatives]$ sudo /usr/sbin/alternatives --config mta

There are 2 programs which provide 'mta'.

Selection Command
-----------------------------------------------
* 1 /usr/sbin/sendmail.sendmail
+ 2 /usr/sbin/sendmail.postfix

Enter to keep the current selection[+], or type selection number: 2
[tf0054@domU-12-31-33-00-03-A8 alternatives]$ ls -la /etc/alternatives/ | grep mta
lrwxrwxrwx 1 root root 26 Nov 22 06:58 mta -> /usr/sbin/sendmail.postfix
lrwxrwxrwx 1 root root 40 Nov 22 06:58 mta-aliasesman -> /usr/share/man/man5/aliases.postfix.5.gz
lrwxrwxrwx 1 root root 22 Nov 22 06:58 mta-mailq -> /usr/bin/mailq.postfix
lrwxrwxrwx 1 root root 38 Nov 22 06:58 mta-mailqman -> /usr/share/man/man1/mailq.postfix.1.gz
lrwxrwxrwx 1 root root 27 Nov 22 06:58 mta-newaliases -> /usr/bin/newaliases.postfix
lrwxrwxrwx 1 root root 43 Nov 22 06:58 mta-newaliasesman -> /usr/share/man/man1/newaliases.postfix.1.gz
lrwxrwxrwx 1 root root 23 Nov 22 06:58 mta-pam -> /etc/pam.d/smtp.postfix
lrwxrwxrwx 1 root root 22 Nov 22 06:58 mta-rmail -> /usr/bin/rmail.postfix
lrwxrwxrwx 1 root root 25 Nov 22 06:58 mta-sendmail -> /usr/lib/sendmail.postfix
lrwxrwxrwx 1 root root 41 Nov 22 06:58 mta-sendmailman -> /usr/share/man/man1/sendmail.postfix.1.gz
[tf0054@domU-xx-31-33-00-03-A8 alternatives]$

びっくりしました。