Mercurial > docs > diploma
diff thesis/tex/1-Introduction.tex @ 78:3148ed044103
wrote about structure and features of masqmail; quotation -> quote
author | meillo@marmaro.de |
---|---|
date | Thu, 06 Nov 2008 17:50:25 +0100 |
parents | 6843dfd6c4fa |
children | 3b5ba7331eb5 |
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--- a/thesis/tex/1-Introduction.tex Thu Nov 06 16:40:27 2008 +0100 +++ b/thesis/tex/1-Introduction.tex Thu Nov 06 17:50:25 2008 +0100 @@ -38,22 +38,22 @@ Here are definitions from others: -\begin{quotation} +\begin{quote} A mail transfer agent (MTA) is a highly specialized program that delivers mail and transports it between machines, like the post office. \cite{costales97} -\end{quotation} +\end{quote} -\begin{quotation} +\begin{quote} A mail transfer agent (MTA) (also called a mail transport agent, message transfer agent, or smtpd (short for SMTP daemon)), is a computer program or software agent that transfers electronic mail messages from one computer to another. \citeweb{wikipedia:mta} -\end{quotation} +\end{quote} -\begin{quotation} +\begin{quote} mail server (also known as a mail transfer agent or MTA, a mail transport agent, a mail router or an Internet mailer) is an application that receives incoming e-mail from local users (people within the same domain) and remote senders and forwards outgoing e-mail for delivery. \citeweb{website:techtarget} -\end{quotation} +\end{quote} -\begin{quotation} +\begin{quote} Message Transfer Agent - (MTA, Mail Transfer Agent): Any program responsible for delivering e-mail messages. Upon receiving a message from a Mail User Agent or another MTA, [...] it [...] delivers it to any local addressees and/or forwards it to other remote MTAs (routing) for delivery to remote recipients. %Any program responsible for delivering e-mail messages. Upon receiving a message from a Mail User Agent or another MTA, often by SMTP over the Internet, it stores it temporarily locally and analyses the recipients and delivers it to any local addressees and/or forwards it to other remote MTAs (routing) for delivery to remote recipients. In either case it may edit and/or add to the message headers. % @@ -61,7 +61,7 @@ % %RFC 2821 (SMTP) expands MTA as ``Mail Transfer Agent'' though this is less common. Alternatives with ``Transport'' are also seen but less correct. \citeweb{website:thefreedictionary} -\end{quotation} +\end{quote} Common is the transfer of mail to other machines; this is the actual job. \MTA{}s work with mail, received from local users and/or remote machines. Mail delivery however is \emph{not} what \mta{}s are for, although probably every \MTA\ is able to deliver mail, and many do. \name{mail delivery agents} (short: \NAME{MDA}) are the programs for this job. Two of the best known \NAME{MDA}s are \name{procmail} and \name{maildrop}. @@ -78,9 +78,9 @@ \cite[page xviii]{costales97} Others see \sendmail's success more critical. One of them is quoted in the \name{MMDF} FAQs \citeweb{faqs:mmdf}: -\begin{quotation} +\begin{quote} Sendmail was once compared by one old Internet hand to ``those killer bees that escaped from the laboratory---and now they're everywhere and you can't get rid of 'em''. -\end{quotation} +\end{quote} He definately hints here at \sendmail's many security vulnerabilities that came to light and on its complexity, in particular its obscure configuration file \path{sendmail.cf}. No matter how \sendmail\ is seen, one must admit its influence on \unix\ emailing programs. Most existing substitutes mimic \sendmail's interface and behavior. Most notable, they create a symbolic link named ``sendmail'' pointing to their own executable. The reason herefor are the many programs assuming an executable called ``sendmail'' on every computer system existing.