This article might also help:
http://www.alistapart.com/articles/spam/
Kind regards,
Grant Bailey
On 30/11/2010 3:47 PM, Chad Kelly wrote:
----- Original Message ----- From: "cat soul" <cats...@thinkplan.org>
To: <wsg@webstandardsgroup.org>
Sent: Tuesday, November 30, 2010 11:03 AM
Subject: [WSG] alt text on email graphic
The technique of using a graphic to communicate an email address in
order to foil spiders or harvesters, like this:
bob at domain dot com
seems pretty clever. Yet, when I think about the alt text for that
image, I'm wondering if that alt text could be exploited by spiders...
would it be good to handle it this way:
<img src="mail.gif" alt="bob's email">
and leave it at that? for those who really use alt text, might they
be short changed by not seeing or hearing:
<img src="mail.gif" alt="bob at domain dot com">
or am I making mountains out of molehills here?
cs
Hmm, using alt text on an image, or rather using an image at all for
this is rather pointless.
As, you can't use alt text as a screen reader won't be able to read
the image content, and if you use alt text spam bots will pick up the
content and spam the address.
The only way you can do it properly, is by either just place the email
strait on the page as a text link, and have some decent spam filtering
to get rid of the crap that comes through, or the better way is to use
a form.
You can't use an image capcha though as they are not accessible, so
you need to be a bit creative with the use of capcha.
Or just program the form script properly and have a decent web
security set-up on your web server.
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