48 lines
2.4 KiB
HTML
48 lines
2.4 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
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<!--Converted with LaTeX2HTML 96.1-c (Feb 29, 1996) by Nikos Drakos (nikos@cbl.leeds.ac.uk), CBLU, University of Leeds -->
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<HTML>
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<HEAD>
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<TITLE>SMTP-based Transports</TITLE>
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</HEAD>
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<BODY LANG="EN">
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<A HREF="node1.html"><IMG WIDTH=65 HEIGHT=24 ALIGN=BOTTOM ALT="contents" SRC="contents_motif.gif"></A> <BR>
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<B> Next:</B> <A HREF="node217.html">Hostname Qualification</A>
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<B>Up:</B> <A HREF="node198.html">Getting smail Up and </A>
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<B> Previous:</B> <A HREF="node215.html">UUCP-based Transports</A>
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<BR> <P>
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<H1><A NAME="SECTION00161000000">SMTP-based Transports</A></H1>
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<A NAME="smailsmtp"></A>
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<A NAME="7844"></A>
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smail currently supports an SMTP driver to deliver mail over
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TCP connections.<A HREF="footnode.html#7845"><IMG ALIGN=BOTTOM ALT="gif" SRC="foot_motif.gif"></A> It is capable of delivering a message to any number of addresses on
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one single host, with the hostname being specified as either a fully
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qualified domain name that can be resolved by the networking software,
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or in dotted quad notation enclosed in square brackets. Generally,
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addresses resolved by any of the BIND, gethostbyname(3), or
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gethostbyaddr(3) router drivers will be delivered to the SMTP
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transport.
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<P>
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The SMTP driver will attempt to connect to the remote host immediately
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through the smtp port as listed in /etc/services. If
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it cannot be reached, or the connection times out, delivery will be
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re-attempted at a later time.
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<P>
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Delivery on the Internet requires that routes to the destination host be
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specified in the <em>route-addr</em> format described in
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chapter-<A HREF="node186.html#mail"><IMG ALIGN=BOTTOM ALT="gif" SRC="cross_ref_motif.gif"></A>, rather than as a bang path.<A HREF="footnode.html#7744"><IMG ALIGN=BOTTOM ALT="gif" SRC="foot_motif.gif"></A> smail will therefore transform user%host@gateway,
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where gateway is reached via host1!host2!host3, into the
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source-route address <@host2,@host3:user%host@gateway> which
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will be sent as the message's envelope address to host1. To
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enable these transformation (along with the built-in BIND driver), you
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have to edit the entry for the smtp driver in the
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transports file. A sample transports file is given in
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Appendix-<A HREF="node285.html#appendixsmail"><IMG ALIGN=BOTTOM ALT="gif" SRC="cross_ref_motif.gif"></A>.
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<P>
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<BR> <HR>
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<P><ADDRESS>
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<I>Andrew Anderson <BR>
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Thu Mar 7 23:22:06 EST 1996</I>
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</ADDRESS>
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</BODY>
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</HTML>
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