Auto-forward email validation bug

[ionutfilip]

Getting Invalid email address when trying to set auto-forward destination to foo@example.amsterdam.

Following the code i got to this regex which i think does the trick.

Mailu/core/admin/mailu/ui/forms.py

Line 40 in fa1e4b8

pattern = re.compile(r'^([_a-z0-9\-]+)(\.[_a-z0-9\-]+)*@([a-z0-9\-]{2,}\.)*([a-z]{2,4})(,([_a-z0-9\-]+)(\.[_a-z0-9\-]+)*@([a-z0-9\-]{2,}\.)*([a-z]{2,4}))*$')