--- a/thesis/tex/1-Candidates.tex	Tue Oct 14 10:37:07 2008 +0200
+++ b/thesis/tex/1-Candidates.tex	Tue Oct 14 10:37:43 2008 +0200
@@ -1,33 +1,56 @@
 \chapter{\unix\ \MTA{}s}
 
-This chapter introduces a group of \mta{}s. These will be presented to the reader in a short overview and with the most important facts. The next chapter will show a comparison of the candidates in several disciplines.
+This chapter introduces a group of \mta{}s.
+These will be presented to the reader in a short overview and with the most important facts.
+The next chapter will show a comparison of the candidates in several disciplines.
 
 
 \section{Types of \MTA{}s}
-``Mail transfer agent'' is a term covering a variety of programs. One thing is common to them: they transport email from one \emph{thing} to another. These \emph{things} can be hosts, meaning independent machines, or protocols like \NAME{SMTP} and \NAME{UUCP}, between which mail is transfered.\footnote{\sendmail{}'s initial purpose was moving mail between \NAME{UUCP}, \name{Berknet} and \NAME{SMTP}.}
+``Mail transfer agent'' is a term covering a variety of programs.
+One thing is common to them: they transport email from one \emph{thing} to another.
+These \emph{things} can be hosts, meaning independent machines, or protocols like \NAME{SMTP} and \NAME{UUCP}, between which mail is transfered.\footnote{\sendmail{}'s initial purpose was moving mail between \NAME{UUCP}, \name{Berknet} and \NAME{SMTP}.}
 
-Beside this common property, \MTA{}s can be very different. Some of them have \NAME{POP3} and/or \NAME{IMAP} servers included. Some can fetch mails through these protocols. Others have have every feature you can think of. And maybe there are some that do nothing else, but transporting email.
+Beside this common property, \MTA{}s can be very different.
+Some of them have \NAME{POP3} and/or \NAME{IMAP} servers included.
+Some can fetch mails through these protocols.
+Others have have every feature you can think of.
+And maybe there are some that do nothing else, but transporting email.
 
 
 \section{The ones not regarded here}
-The candidates for the competition in the next chapter are a subset of the \MTA{}s available. Comparision between totally different programs (apart of one function) makes not much sense. One would not use a program for a job it is not suited for. Therefor \mta{}s that are rarely similar to \masqmail\ are not regarded.
+The candidates for the competition in the next chapter are a subset of the \MTA{}s available.
+Comparision between totally different programs (apart of one function) makes not much sense.
+One would not use a program for a job it is not suited for.
+Therefor \mta{}s that are rarely similar to \masqmail\ are not regarded.
 
-The first group of programs to sort out are the so called \name{groupware} programs. These provide a whole lot of functions, including mail transfer, file storage, calendars, resource management, instant messaging and more.
+The first group of programs to sort out are the so called \name{groupware} programs.
+These provide a whole lot of functions, including mail transfer, file storage, calendars, resource management, instant messaging and more.
 Examples for this kind of programs are: \name{Lotus Notes}, \name{Microsoft Exchange}, \name{OpenGroupware.org} and \name{eGroupWare}.
 
 The second group are the \name{relay-only} \MTA{}s.
-They transfer mail only to defined \name{smart hosts}\index{smart host}\footnote{MTAs that receives email and route it to the actual destination}. Most \MTA{}s can be configured to act as such a forwarder. But this is normally an additional functionality.
+They transfer mail only to defined \name{smart hosts}\index{smart host}\footnote{\MTA{}s that receives email and route it to the actual destination}.
+Most \MTA{}s can be configured to act as such a forwarder.
+But this is normally an additional functionality.
 Examples for that group are: \name{nullmailer}, \name{ssmtp} and \name{esmtp}.
 
-Third, only \emph{sendmail-compatible} \MTA{}s will be regarded in the competition. The ones not \emph{sendmail-compatible} are not from big interest on \unix\ systems. %FIXME: write it the other way round: the group sorted out.
+Third, only \emph{sendmail-compatible} \MTA{}s will be regarded in the competition.
+Hence all \MTA{}s not having a \emph{sendmail-compatible} interface or not offering it as a compatibility addon, will not be covered here.
+The reason is the heavy reliance of \unix\ systems on the existance of a programs called \path{sendmail}.
+This has historical reasons. See section \ref{sec:sendmail} for further information.
+
+Further more, only programs with source code available are regarded. %FIXME: why
 
 
 \section{The competitors}
-%FIXME: are these all MTAs of that group? why these and not others?
-%TODO: what about `courir-mta'?
 The programs remaining are \emph{sendmail-compatible} ``smart'' \MTA{}s that do not offer masses of features unrelated to mail transport.
 
-For the comparision, five programs of this group are taken. These are: \sendmail, \name{qmail}, \name{postfix}, \name{exim} and \masqmail. The four alternatives to \masqmail\ are the most important representatives of the regarded group.
+For the comparision, five programs of this group are taken.
+These are: \sendmail, \name{qmail}, \name{postfix}, \name{exim} and \masqmail.
+The four alternatives to \masqmail\ are the most important representatives of the regarded group.
+%TODO: what about having one program as ``outsider'' ...?
+
+Other, but not covered, group members are: %FIXME:  are these all MTAs of that group? why these and not others?
+%TODO: what about `courir-mta'?
 
 Here follows a small introduction to each of the five.
 
@@ -48,7 +71,9 @@
 %TODO: references to various descriptions
 
 \subsection{\masqmail}
-The \masqmail\ program was written by Oliver Kurth, starting in 1999. His aim was to create a \mta\ which is especially focused on computers with dial-up connections to the internet. \masqmail\ handles situations which are rarely solveable with the common \MTA{}s.
+The \masqmail\ program was written by Oliver Kurth, starting in 1999.
+His aim was to create a \mta\ which is especially focused on computers with dial-up connections to the internet.
+\masqmail\ handles situations which are rarely solveable with the common \MTA{}s.
 %TODO: references to various descriptions