stupid questions about apt-get/dpkg

[Bram Dumolin <bram-debian@grmbl.net>]

re all,

How do you simply replace a package with another package that offers the same functionality?
exim provides mail-transport-agent
qmail as well

so I want to upgrade mail-transport-agent from exim to qmail

What's the best way to do that? Pointers on a good apt-get/dpkg faq?

-- 
	 People using html in email should be shot.

Democracy can learn some things from Communism: for example, when a
Communist politician is through, he is through.

By US Code Title 47, Sec.227(a)(2)(B), a computer/modem/printer meets the definition of a telephone fax machine. By Sec.227(b)(1)(C), it is unlawful to send any unsolicited advertisement to such equipment. By Sec.227(b)(3)(C), a violation of the aforementioned Section is punishable by action to recover actual monetary loss, or $500, whichever is greater, for each violation.