http://issues.apache.org/SpamAssassin/show_bug.cgi?id=5352





------- Additional Comments From [EMAIL PROTECTED]  2007-03-07 10:35 -------
Excuse me butting on on someone else's issue, but are you sure about that RE ?  
It will always require one character other than 'a' before the 'cm', which may 
or may not be what you mean.  The original \S* can occur zero times so I guess 
you're trying to match on hostnames like "cm-12-34-56-78.bigisp.com" ?

In that case I'm sure you all know zero-width negative lookbehinds off by 
heart so excuse me for teaching relatives :-).  The RE for "there may be no 
characters before, but if there is one it mustn't be a" should be /(?<!a)cm/
Other ways round it such as [^a]? will, I think, fall foul of the \S* soaking 
up characters.



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