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<TITLE>Exim Filter Specification - Testing for personal mail</TITLE>
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<P><HR><P>
<H2><A NAME="SEC22" HREF="filter_toc.html#TOC22">Testing for personal mail</A></H2>
<P>
A common requirement is to distinguish between incoming personal mail and mail
from a mailing list.
In particular, this test is normally required for so-called `vacation
messages'.
The condition
<PRE>
personal
</PRE>
<P>
is a shorthand for
<PRE>
$header_to: contains $local_part@$domain and
$header_from: does not contain $local_part@$domain and
$header_from: does not contain server@ and
$header_from: does not contain daemon@ and
$header_from: does not contain root@ and
$header_subject: does not contain "circular" and
$header_precedence: does not contain "bulk" and
$header_precedence: does not contain "list" and
$header_precedence: does not contain "junk"
</PRE>
<P>
The variable <TT>`$local_part'</TT> contains the local part of the mail address of
the user whose filter file is being run -- it is normally your login id. The
<TT>`$domain'</TT> variable contains the mail domain. This condition tests for the
appearance of the current user in the <TT>`To:'</TT> header, checks that the sender is
not the current user or one of a number of common daemons, and checks the
content of the <TT>`Subject:'</TT> and <TT>`Precedence:'</TT> headers.
</P>
<P>
If prefixes or suffixes are in use for local parts -- something which depends
on the configuration of Exim (see section 26 below) -- then the first
two tests above are also done with
<PRE>
$local_part_prefix$local_part$local_part_suffix
</PRE>
<P>
instead of just $<EM>local_part</EM>. If the system is configured to rewrite local
parts of mail addresses, for example, to rewrite `dag46' as `Dirk.Gently', then
the rewritten form of the address is also used in the tests.
</P>
<P>
This example shows the use of <EM>personal</EM> in a filter file that is sending out
vacation messages:
<PRE>
if personal then
mail
to $reply_address
subject "Re: $h_subject:"
file $home/vacation/message
once $home/vacation/once
once_repeat 10d
endif
</PRE>
<P>
It is quite common for people who have mail accounts on a number of different
systems to forward all their mail to one system, and in this case a check for
personal mail should test all their various mail addresses. To allow for this,
the <EM>personal</EM> condition keyword can be followed by
<PRE>
alias <<EM>address</EM>>
</PRE>
<P>
any number of times, for example
<PRE>
personal alias smith@else.where alias jones@other.place
</PRE>
<P>
<font color=green>
This causes messages containing the alias addresses in any places where the
local address is tested to be treated as personal.
</font>
</P>
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