Don't you just hate those SPAM/UCE messages which have your actual email address buried amongst a bunch of similar addresses, in the 'To' or 'Cc'? Normally, you'd keep any message which contains your address in the 'To' or 'Cc'.

I made a filter by collecting some of these other addresses. I don't know any of these people, so there is no chance I'll ever want any email that is 'Cc'-ed to them. This has proven to be highly effective against such SPAM/UCE. It also demonstrates the kind of flexibility this 'rifle' program gives you in specifiying your filters. 

    { hdr   => [ 'To', 'Cc' ],
      regex => 'gerard\@('.join('|', map(quotemeta, qw(
memes.com
midusa.net
mis.net
misterat.com
mkb.hobby.nl
mlecmn.net
mninter.net
mobilnet.net
monad.net
moncourrier.com
mood.freeserve.co.uk
moransopticians.healthnet.co.uk
mozcom.com
mrnet.com
msi.campus-ventures.co.uk
msn.com
))).
')', 
      op    => 'toss',
      desc  => 'SPAM/UCE with many gerards in To/Cc list' },

[download]

In reply to Additional filtering suggestion. by perldoc
in thread 'rifle' - POP3 Mailbox SPAM/UCE Filter by perldoc

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.