<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML//EN"> <html> <head> <title>MHonArc Resources: ADDRESSMODIFYCODE</title> </head> <body> <address> <a href="../resources.html#addressmodifycode">MHonArc Resource List</a><br> </address> <hr> <h1>ADDRESSMODIFYCODE</h1> <!-- *************************************************************** --> <hr> <h2>Syntax</h2> <dl> <dt><strong>Envariable</strong><dt> <dd><p> <code>M2H_ADDRESSMODIFYCODE=<var>Perl_expressions</var></code> </p> </dd> <dt><strong>Element</strong><dt> <dd><p><br> <code><ADDRESSMODIFYCODE></code><br> <var>Perl expressions...</var><br> <code></ADDRESSMODIFYCODE></code><br> </p> </dd> <dt><strong>Command-line Option</strong><dt> <dd><p><br> <code>-addressmodifycode </code><var>Perl_expressions</var> </p> </dd> </dl> <!-- *************************************************************** --> <hr> <h2>Description</h2> <p>ADDRESSMODIFYCODE may be used to define Perl expressions to apply to addresses in message headers during conversion. </p> <p>When defining the expressions, the mail address will be in the <b><tt>$_</tt></b> variable. The value of <b><tt>$_</tt></b> after all expressions are evaluated is the address MHonArc will print. </p> <table border=0 cellpadding=4> <tr valign=top> <td><a name="note1"><strong>NOTE</strong></a></td> <td><p>ADDRESSMODIFYCODE only affects the display text of the address. If <a href="mailto.html">MAILTO</a> is active, the URL of the link is <b>NOT</b> affected by ADDRESSMODIFYCODE. <a href="mailtourl.html">MAILTOURL</a> can be used to modify the URL. </p> </td> </tr> </table> <!-- *************************************************************** --> <hr> <h2>Default Setting</h2> <p>Nil. </p> <!-- *************************************************************** --> <hr> <h2>Resource Variables</h2> <p>N/A </p> <!-- *************************************************************** --> <hr> <h2>Examples</h2> <p>ADDRESSMODIFYCODE main use is to obfuscate addresses, or hide them entirely, to prevent spam address harvesters from getting user addresses from MHonArc archives. Here is an example that performs a ROT13 to provide some simple obfuscation: </p> <pre> <AddressModifyCode> tr/A-Za-z/N-ZA-Mn-za-m/; </AddressModifyCode> </pre> <p>However, this may not be enough since an intelligent harvester may try a ROT13. To completely hide the address, do something like this: </p> <pre> <AddressModifyCode> $_ = 'address@hidden'; </AddressModifyCode> </pre> <p>You cannot rely on ADDRESSMODIFYCODE alone to hide/obfuscate addresses (see <a href="#note1">NOTE</a> above). Also look at the <a href="spammode.html">SPAMMODE</a> if you are interested in fighting address harvesting. </p> <!-- *************************************************************** --> <hr> <h2>Version</h2> <p>2.4.0 </p> <!-- *************************************************************** --> <hr> <h2>See Also</h2> <p> <a href="mailto.html">MAILTO</a>, <a href="mailtourl.html">MAILTOURL</a>, <a href="spammode.html">SPAMMODE</a>, </p> <!-- *************************************************************** --> <hr> <address> 00/10/28 11:12:59<br> <img align="top" src="../monicon.gif" alt=""> <a href="http://www.pobox.com/~ehood/mhonarc.html" ><strong>MHonArc</strong></a><br> Copyright © 1999, <a href="http://www.pobox.com/~ehood/" >Earl Hood</a>, <a href="mailto:mhonarc@pobox.com" >mhonarc@pobox.com</a><br> </address> </body> </html>
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