id	summary	reporter	owner	description	type	status	component	version	severity	resolution	keywords	cc	stage	has_patch	needs_docs	needs_tests	needs_better_patch	easy	ui_ux
17386	Validation & Unicode Character 'ZERO WIDTH SPACE' (U+200B)	Raymond Penners	nobody	"Once in a while users somehow manage to inject e-mail addresses into the system containing unicode zero width space characters. I am not sure how they do it -- it probably happens when copy/pasting from a document of some sorts. Nevertheless, form validation does not reject such e-mail addresses:

{{{
>>> from django.core.validators import validate_email
>>> email=u'test@hotmail.co\u200bm'
>>> validate_email(email)
>>> # No ValidationError ?
}}}

These e-mail addresses get accepted and cause trouble later on (try sending mail to them, or hashing them for gravatar uses).  Either:
a) Raise a ValidationError for such e-mail addresses, or
b) Automatically strip this character 

Downside of a) is that the user is most likely unaware of this invisible character. He wouldn't know what character to remove where, even if instructed by an error message.

"	Uncategorized	closed	Forms	1.3	Normal	wontfix			Unreviewed	0	0	0	0	0	0