Produits Entr'ouvert » w.c.s.

Sans chercher l'origine du \n on pourrait juste strip().

https://sentry.entrouvert.org/entrouvert/publik/issues/113173/

BadHeaderError: Header values can't contain newlines (got 'xxx@orange.fr\n' for header 'To')
(5 additional frame(s) were not displayed)
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  File "django/core/mail/backends/smtp.py", line 123, in _send
    message = email_message.message()
  File "django/core/mail/message.py", line 250, in message
    self._set_list_header_if_not_empty(msg, 'To', self.to)
  File "django/core/mail/message.py", line 405, in _set_list_header_if_not_empty
    msg[header] = value
  File "django/core/mail/message.py", line 184, in __setitem__
    name, val = forbid_multi_line_headers(name, val, self.encoding)
  File "django/core/mail/message.py", line 60, in forbid_multi_line_headers
    raise BadHeaderError("Header values can't contain newlines (got %r for header %r)" % (val, name))