Re: filtering recipe

raven(_at_)tribe(_dot_)onlinetoday(_dot_)com asked,

| Do you know of documentation that I could research
| that gives me a rundown of how to filter strings with that kind of
| granularity?  That way I can kill usa.net and not a netusa.net.

Probably any source on regular expressions.  I don't remember the original
condition, but something like

  ^From:.*@(.*\.)?usa\.net

would match addresses at usa.net or subdomains without matching netusa.net.