[Zope] Email address validator?

[Jim Washington]

Bruce Eckel wrote:

>Thanks! I spent a bit of time refactoring it. Also, I decided that if it worked it would return the address, otherwise it would return None to indicate failure.
>
[refactored code snipped]

Interesting style!   Thanks!  Always good to learn a new thing or two. 
 Do you plan to work on the other part about querying the SMTP server 
about whether it accepts mail for [email_address]?

-- Jim Washington