But, the newsletter do have a copyright notice, so people can not just copy/paste the entire letter.
A copyright notice itself (as in "(C) 2003, Anton Berg") has no real legal meaning, it's more a warning/notice about who claims to be the owner/author of the document. Whether copyright laws should apply to the document or not is decided by other factors. Among others, the document has to reach a certain level of "work" (as in work of art, authorship, etc). A book is clearly covered by copyright laws. A leaflet about the author is signing his book in a bookshop on friday afternoon, might not be.
But even if copyright do apply you are allways allowed to discuss the contents in public. You are even allowed to quote parts, as long as you refer to the original author and you are not using his/her material in a (for the author) condescending or disadvantageous way. This is quite usual in journalistic publications and academic essays, etc.
