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IS_EMAIL validator uses now more strict regular expression for email adresses and has two new parameters to control the domains: INPUT(_type='text', _name='name', requires=IS_EMAIL(banned=None, forced=None)) 1. banned: regular expression text for disallowed address domains 2. forced: regular expression text for required address domains Both arguments can also be custom objects with a match(value) method. Examples: Check for valid email address that can't be from a .com domain: INPUT(_type='text', _name='name', requires=IS_EMAIL(banned='^.*\.com(|\..*)$')) Will not validate for addresses with .com in domain, eg. foo@bar.com, foo@bar.com.baz Check for valid email address that must be from a .edu domain: INPUT(_type='text', _name='name', requires=IS_EMAIL(forced='^.*\.edu(|\..*)$')) Will validate only for addresses with .edu in domain, eg. foo@bar.edu foo@bar.edu.baz