> Does anyone have any ideas how I'd specify this?  Would I have to use a
> pcre like the following?
> 
> /[^e][^x][^a][^m][^p][^l][^e][^\.][^c][^o][^m]$/    WARN

If you choose to use pcre, see:  http://www.postfix.com/pcre_table.5.html
It includes an example:  !/<pattern>/<flags>    <result>  
Note that by default, matches are case insensitive (see -i flag)

Michael



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