diff --git a/sendgrid_backend/mail.py b/sendgrid_backend/mail.py
index de80031..d50e8ad 100644
--- a/sendgrid_backend/mail.py
+++ b/sendgrid_backend/mail.py
@@ -310,11 +310,13 @@ def _build_sg_personalization(
 
         if not personalization.ccs:
             for addr in msg.cc:
-                personalization.add_cc(Email(*self._parse_email_address(addr)))
+                if addr:
+                    personalization.add_cc(Email(*self._parse_email_address(addr)))
 
         if not personalization.bccs:
             for addr in msg.bcc:
-                personalization.add_bcc(Email(*self._parse_email_address(addr)))
+                if addr:
+                    personalization.add_bcc(Email(*self._parse_email_address(addr)))
 
         if not personalization.custom_args:
             for k, v in getattr(msg, "custom_args", {}).items():
diff --git a/test/test_mail.py b/test/test_mail.py
index a4389fa..b5e78f1 100644
--- a/test/test_mail.py
+++ b/test/test_mail.py
@@ -48,8 +48,10 @@ def test_EmailMessage(self):
             body="Hello, World!",
             from_email="Sam Smith <sam.smith@example.com>",
             to=["John Doe <john.doe@example.com>", "jane.doe@example.com"],
-            cc=["Stephanie Smith <stephanie.smith@example.com>"],
-            bcc=["Sarah Smith <sarah.smith@example.com>"],
+            # Include blank address to confirm that it's ignored
+            cc=["Stephanie Smith <stephanie.smith@example.com>", ""],
+            # Include blank address to confirm that it's ignored
+            bcc=["Sarah Smith <sarah.smith@example.com>", ""],
             reply_to=["Sam Smith <sam.smith@example.com>"],
         )