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+.\"                                      Hey, EMACS: -*- nroff -*-
+.\" First parameter, NAME, should be all caps
+.\" Second parameter, SECTION, should be 1-8, maybe w/ subsection
+.\" other parameters are allowed: see man(7), man(1)
+.TH EXIM_CONVERT4R4 8 "March 26, 2003"
+.\" Please adjust this date whenever revising the manpage.
+.\"
+.\" Some roff macros, for reference:
+.\" .nh        disable hyphenation
+.\" .hy        enable hyphenation
+.\" .ad l      left justify
+.\" .ad b      justify to both left and right margins
+.\" .nf        disable filling
+.\" .fi        enable filling
+.\" .br        insert line break
+.\" .sp <n>    insert n+1 empty lines
+.\" for manpage-specific macros, see man(7)
+.\" \(oqthis text is enclosed in single quotes\(cq
+.\" \(lqthis text is enclosed in double quotes\(rq
+.SH NAME
+exim_convert4r4 \- Convert Exim configuration from v3 to v4 format
+.SH SYNOPSIS
+.B exim_convert4r4
+
+.SH DESCRIPTION
+This script is provided to assist in updating Exim configuration files.
+It reads an Exim 3 configuration file on the standard input, and writes a
+modified file on the standard output.
+It also writes comments about what it has done to the standard error file.
+It assumes that the input is a valid Exim 3 configuration file.
+A typical call to the conversion script might be
+
+.I exim_convert4r4  < /etc/exim/exim.conf  > /etc/exim4/exim4.conf.new
+
+The output file
+.B MUST
+be checked and tested before trying to use it on a live system.
+The conversion script is just an aid which does a lot of the \(lqgrunt
+work\(rq.
+It does not guarantee to produce an Exim 4 configuration that behaves
+exactly the same as the Exim 3 configuration it reads.
+
+Each option change in the new file is preceded by an identifying comment.
+In fact, the conversion script tends to make quite a mess of your
+configuration, and you should expect to go through it afterwards and tidy
+it up by hand.
+
+Unless you are running a very straightforward configuration, the automatic
+conversion is likely to generate a non-optimal configuration.
+You should not only check it thoroughly, but also run as many tests as you
+can, to ensure that it is working as you expect.
+In particular, you should test address routing, using \-bt and \-bv, and the
+policy controls, using \-bh.
+If possible, you should also do some live tests (i.e. send and receive
+some messages) before putting Exim 4 into service.
+
+If you have a very complicated configuration, it is possible that
+exim_convert4r4 will break it in some situations, which is why thorough
+testing is strongly recommended.
+
+.SH BUGS
+This manual page needs a major re-work. If somebody knows better groff
+than us and has more experience in writing manual pages, any patches
+would be greatly appreciated.
+
+.SH SEE ALSO
+.BR exim (8),
+the files in /usr/share/doc/exim4\-base/, especially Exim4.upgrade.gz
+
+.SH AUTHOR
+This manual page was stitched together from Exim4.upgrade by
+Andreas Metzler <ametzler at downhill.at.eu.org>,
+for the Debian GNU/Linux system (but may be used by others).