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comparison thesis/tex/3-MailTransferAgents.tex @ 308:273f2d174315

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54 ``Real \MTA{}s'' include \sendmail, \exim, \qmail, and \postfix. 54 ``Real \MTA{}s'' include \sendmail, \exim, \qmail, and \postfix.
55 55
56 56
57 \subsubsection*{Other segmenting} 57 \subsubsection*{Other segmenting}
58 \name{Mail transfer agents} can also be split in other ways. 58 \name{Mail transfer agents} can also be split in other ways.
59 Due to \sendmail's significance---described in section \ref{sec:sendmail}---compatibility interfaces for \sendmail\ are important for \unix\ \MTA{}s. Being not \emph{sendmail-compatible} may not matter for some fields of action, but makes the program ineligible for serving as a general purpose \MTA\ on \unix\ systems. Hence being sendmail-compatible is a major property of a \mta. %todo: how many MTAs are sendmail-compatible? 59
60 Due to \sendmail's significance in the early times of email, compatibility interfaces for \sendmail\ are important for \unix\ \MTA{}s. The reason is that many mail applications simply the \sendmail\ \MTA\ to be installed on the system. Being not \emph{sendmail-compatible} may not matter for some fields of action, but makes the program ineligible for serving as a general purpose \MTA\ on \unix\ systems. Hence being sendmail-compatible is a major property of a \mta. %todo: how many MTAs are sendmail-compatible?
60 \MTA{}s not having a \emph{sendmail-compatible} interface or not offering it as a compatibility add-on, will not be covered here. One example for such a program is \name{Apache James}. %FIXME: check if correct 61 \MTA{}s not having a \emph{sendmail-compatible} interface or not offering it as a compatibility add-on, will not be covered here. One example for such a program is \name{Apache James}. %FIXME: check if correct
61 62
62 Another separation can be done between \freesw\ \MTA{}s and proprietary ones. Many of the \MTA{}s for \unix\ systems are \freesw. Only these are regarded in the following sections, because comparing \freesw\ with proprietary or commercial software is not what typical users of programs like \masqmail\ do. %fixme: what are typical users? 63 Another separation can be done between \freesw\ \MTA{}s and proprietary ones. Many of the \MTA{}s for \unix\ systems are \freesw. Only these are regarded in the following sections, because comparing \freesw\ with proprietary or commercial software is not what typical users of programs like \masqmail\ do. %fixme: what are typical users?
63 Comparison with non-free programs may be a point for large \freesw\ projects, trying to step into the business world. Small projects, mostly used by individuals at home, %fixme: is this the right target field? see chap02 64 Comparison with non-free programs may be a point for large \freesw\ projects, trying to step into the business world. Small projects, mostly used by individuals at home, %fixme: is this the right target field? see chap02
64 need to be compared against other projects of similar shape. The document is seen from \masqmail's point of view---an \MTA\ for \unix\ systems on home servers and workstations---so non-free software is out of the way. 65 need to be compared against other projects of similar shape. The document is seen from \masqmail's point of view---an \MTA\ for \unix\ systems on home servers and workstations---so non-free software is out of the way.
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85 86
86 \section{Popular MTAs} 87 \section{Popular MTAs}
87 88
88 This section introduces a selection of popular \MTA{}s; they are the most likely substitutes for \masqmail. All are \emph{sendmail-compatible} ``smart'' \freesw\ \MTA{}s that focus on mail transfer, as is \masqmail. 89 This section introduces a selection of popular \MTA{}s; they are the most likely substitutes for \masqmail. All are sendmail-compatible ``smart'' \freesw\ \MTA{}s that focus on mail transfer, as is \masqmail.
89 90
90 The programs chosen to be compared, with each other and with \masqmail, are: \sendmail, \exim, \qmail, and \postfix. They are the most important representatives of the regarded group. 91 The programs chosen to be compared, with each other and with \masqmail, are: \sendmail, \exim, \qmail, and \postfix. They are the most important representatives of the regarded group.
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92 93
93 \subsection{Market share analysis} 94 \subsection{Market share analysis}
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180 181
181 \section{Comparison of MTAs} 182 \section{Comparison of MTAs}
183 \label{sec:mta-comparison}
182 184
183 This section does not try to provide an overall \MTA\ comparison, because this is already done by others. Remarkable comparisons are the one by \person{Dan Shearer} \cite{shearer06} and a discussion on the mailing list \name{plug@lists.q-linux.com} \cite{plug:mtas}. Tabular overviews may be found at \citeweb{mailsoftware42}, \citeweb{wikipedia:comparison-of-mail-servers}, and \cite[section 1.9]{lifewithqmail}. 185 This section does not try to provide an overall \MTA\ comparison, because this is already done by others. Remarkable comparisons are the one by \person{Dan Shearer} \cite{shearer06} and a discussion on the mailing list \name{plug@lists.q-linux.com} \cite{plug:mtas}. Tabular overviews may be found at \citeweb{mailsoftware42}, \citeweb{wikipedia:comparison-of-mail-servers}, and \cite[section 1.9]{lifewithqmail}.
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185 Here provided is an overview on important properties of the four previously introduced \MTA{}s. The data comes from the above stated sources and is collected in table \ref{tab:mta-comparison}. 187 Here provided is an overview on important properties of the four previously introduced \MTA{}s. The data comes from the above stated sources and is collected in table \ref{tab:mta-comparison}.
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