Well, strictly speaking it is indirectly installed as a Recommends. Had it been a hard dependency you wouldn't have been able to remove postfix, without also having your mysql-server-5.1 removed.
What happens is that mysql-server-5.1 recommends mailx, which depends on bsd-mailx, which in turn recommends postfix (or other MTA). This is a change compared to mysql-server-5.0 where mailx is only Suggested, hence not installed automatically. I agree that it's not really an expected behavior to have postfix installed when you actually doing an mysql-server install. That said I'm not entirely sure yet if this actually is a bug. Having a minimal MTA (such as send-only) can more or less be considered a must on a standard server. For now I'll mark this bug as Incomplete, and ask for feedback on it. ** Package changed: mysql-dfsg-5.0 (Ubuntu) => mysql-dfsg-5.1 (Ubuntu) ** Changed in: mysql-dfsg-5.1 (Ubuntu) Status: New => Incomplete ** Summary changed: - Postfix is dependancy for MySQL Server on server edition + MySQL-server-5.1 indirectly installs postfix -- MySQL-server-5.1 indirectly installs postfix https://bugs.launchpad.net/bugs/370445 You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to mysql-dfsg-5.1 in ubuntu. -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs