diff --git a/poweremail_core.py b/poweremail_core.py
index 18c2017..ed25548 100644
--- a/poweremail_core.py
+++ b/poweremail_core.py
@@ -50,7 +50,7 @@
 def filter_send_emails(emails_str):
     if not emails_str:
         emails_str = ''
-    return ', '.join(set([e.strip() for e in emails_str.split(',')]))
+    return ', '.join(set([e.strip() for e in emails_str.split(',') if e.strip()]))
 
 _priority_selection = [('0', 'Low'),
                        ('1', 'Normal'),