>Is there a possibility or any known method of forbidding NickServ
>registration email addresses based on regexp, and if not, could this be
>a feature at some point?
Services 5.1 will allow forbidding E-mail addresses by wildcard
(although not regular expression) with respect to the NickServ REGISTER
and SET EMAIL commands.
--Andrew Church
achurch at achurch.org
http://achurch.org/