on websites (our site which is managed by Finalsite does this). This leaves
them clickable to end users, but invisible to bots that scan the raw html.
Many email addresses that spammers get are obtained by bots that scan the
raw html of webpages looking for content that is in the form of an email;
that is, two blocks of text connected by the '@' symbol. The beauty of the
javascript tool is that the raw html has nothing that looks like an email
address, but the rendered web page presents something that looks like an
email address and that when clicked acts like a mailto: reference.
As for the other question about filters, currently I'm pretty happy with our
Barracuda. We've got it locked down pretty tight with very few false
positives and very little leakage of bad emails. It took a while to get it
to this point but now needs very little maintenance.
Christopher
--
Christopher Butler
Academic Technology Director
St. John's Preparatory School
http://www.stjohnsprep.org
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