diff --git a/core/admin/mailu/ui/forms.py b/core/admin/mailu/ui/forms.py
index 79b1445d..b6c45189 100644
--- a/core/admin/mailu/ui/forms.py
+++ b/core/admin/mailu/ui/forms.py
@@ -38,7 +38,7 @@ class MultipleEmailAddressesVerify(object):
         self.message = message
 
     def __call__(self, form, field):
-        pattern = re.compile(r'^([_a-z0-9\-\+]+)(\.[_a-z0-9\-\+]+)*@([a-z0-9\-]{1,}\.)*([a-z]{1,})(,([_a-z0-9\-\+]+)(\.[_a-z0-9\-\+]+)*@([a-z0-9\-]{1,}\.)*([a-z]{2,}))*$')
+        pattern = re.compile(r'^([_a-z0-9\-\+]+)(\.[_a-z0-9\-\+]+)*@([a-z0-9\-]{1,}\.)*([a-z]{1,})(,([_a-z0-9\-\+]+)(\.[_a-z0-9\-\+]+)*@([a-z0-9\-]{1,}\.)*([a-z]{2,}))*$', re.IGNORECASE)
         if not pattern.match(field.data.replace(" ", "")):
             raise validators.ValidationError(self.message)
 
diff --git a/towncrier/newsfragments/3095.bugfix b/towncrier/newsfragments/3095.bugfix
new file mode 100644
index 00000000..73f37281
--- /dev/null
+++ b/towncrier/newsfragments/3095.bugfix
@@ -0,0 +1 @@
+Ensure that the form validator related to forwarding addresses allows for uppercase