diff --git a/staffeln/common/email.py b/staffeln/common/email.py
index b1d3239..6aaaf9b 100644
--- a/staffeln/common/email.py
+++ b/staffeln/common/email.py
@@ -11,9 +11,14 @@
 
 def send(smtp_profile):
     """Email send with SMTP"""
+    dest_header = (
+        smtp_profile["dest_email"]
+        if isinstance(smtp_profile["dest_email"], str)
+        else str(smtp_profile["dest_email"])
+    )
     message = MIMEText(smtp_profile["content"], "html", "utf-8")
     message["From"] = Header(smtp_profile["src_name"], "utf-8")
-    message["To"] = Header(smtp_profile["dest_email"], "utf-8")
+    message["To"] = Header(dest_header, "utf-8")
     message["Subject"] = Header(smtp_profile["subject"], "utf-8")
     try:
         smtp_obj = smtplib.SMTP(
diff --git a/staffeln/conductor/result.py b/staffeln/conductor/result.py
index 88173ca..b107172 100644
--- a/staffeln/conductor/result.py
+++ b/staffeln/conductor/result.py
@@ -32,11 +32,11 @@
             subject = "Staffeln Backup result"
         if len(CONF.notification.receiver) != 0:
             # Found receiver in config, override report receiver.
-            receiver = ",".join(CONF.notification.receiver)
+            receiver = CONF.notification.receiver
         elif not CONF.notification.project_receiver_domain:
             try:
-                receiver = ",".join(
-                    self.backup_mgt.openstacksdk.get_project_member_emails(project_id)
+                receiver = self.backup_mgt.openstacksdk.get_project_member_emails(
+                    project_id
                 )
                 if not receiver:
                     LOG.warn(