Here is an example of a Regular Expression filter. Lately I have been inundated with spams with similar subject lines, but each one slightly different. Examples:

Re: ParamCcy news
Re: PaLramcy news
Re: Pharamanhcy news
Re: P5aramcy news
Re: PaC0ramcy news

All of the subject lines follow a precise pattern

To create a regular expression, we need to look for " Re: P" at the start of the line, 6, 7, 8 or 9 alphanumeric characters, followed by "y news"

In a regular expression,
the symbol ^means the start of a line
the symbol \w means an alphanumeric character
the symbol {6,9} means occurring 6 to 9 times

So the regular expression ^Re: P\w{6,9}y news will look for " Re: P" at the start of the line, 6 to 9 alphanumeric characters, followed by "y news"

To define the filter, you would follow Tools > Spam Tools > My filters > Add.
Give the filter a name, set a color, choose an action, then select the options shown below. Save the filter and say goodbye to those Re: P7aramcy news spams.

This filter and over 60 others using regular expressions are included in the Wiki at http://wiki.castlecops.com/A_list_of_Regex_topics#Various_Regular_Expression_Topics

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Description:	Filter out Re: P7aramcy news spam
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