> If a spider could read the alt attribute, don't you think they  
> could read the href attribute?
> Alt="j...@smith.com" or href="mailto:j...@smith.com";
>
> It doesn't matter where you put the valid email address, the  
> spiders will find it. However, messing with images will just make  
> it more difficult on the user.

They probably just use a regex to find anything that looks like an email
address, 
If it is anywhere in the page they will find it.

Another approach could be to use a form to send an email rather than publish
the email address on the page but remember there are also bots that will
post spam to forms.




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