emails: restrict domains for default_from_email (#72173)

hobo/emails/forms.py

@@ -17,7 +17,7 @@ from django import forms
 from django.core.validators import validate_email
 from django.utils.translation import ugettext_lazy as _
 
-from hobo.emails.validators import validate_email_address, validate_email_spf, validate_email_domain
+from hobo.emails.validators import validate_email_address, validate_email_domain, validate_email_spf
 
 
 class ValidEmailField(forms.EmailField):

tests/test_emails.py

@@ -15,7 +15,7 @@ from dns.rdtypes.ANY import MX, TXT
 from test_manager import login
 
 from hobo.emails.validators import validate_email_address
-from hobo.environment.models import Variable, ServiceBase, Combo
+from hobo.environment.models import Combo, ServiceBase, Variable
 from hobo.test_utils import find_free_port