Add bcc option for event emails

src/pretix/base/services/mail.py

@@ -106,9 +106,12 @@ def mail(email: str, subject: str, template: Union[str, LazyI18nString],
             'color': '#8E44B3'
         }
 
+        bcc = []
         if event:
             htmlctx['event'] = event
             htmlctx['color'] = event.settings.primary_color
+            if event.settings.mail_bcc:
+                bcc.append(event.settings.mail_bcc)
 
             if event.settings.mail_from == settings.DEFAULT_FROM_EMAIL and event.settings.contact_mail and not headers.get('Reply-To'):
                 headers['Reply-To'] = event.settings.contact_mail
@@ -153,6 +156,7 @@ def mail(email: str, subject: str, template: Union[str, LazyI18nString],
 
         send_task = mail_send_task.si(
             to=[email],
+            bcc=bcc,
             subject=subject,
             body=body_plain,
             html=body_html,

src/pretix/base/settings.py

@@ -225,6 +225,10 @@ DEFAULTS = {
         'default': None,
         'type': str
     },
+    'mail_bcc': {
+        'default': None,
+        'type': str
+    },
     'mail_from': {
         'default': settings.MAIL_FROM,
         'type': str

src/pretix/control/forms/event.py

@@ -663,6 +663,11 @@ class MailSettingsForm(SettingsForm):
         label=_("Sender address"),
         help_text=_("Sender address for outgoing emails")
     )
+    mail_bcc = forms.EmailField(
+        label=_("Bcc address"),
+        help_text=_("All emails will be sent to this address as a Bcc copy"),
+        required=False
+    )
 
     mail_text_signature = I18nFormField(
         label=_("Signature"),

src/pretix/control/templates/pretixcontrol/event/mail.html

@@ -11,6 +11,7 @@
             {% bootstrap_field form.mail_prefix layout="control" %}
             {% bootstrap_field form.mail_from layout="control" %}
             {% bootstrap_field form.mail_text_signature layout="control" %}
+            {% bootstrap_field form.mail_bcc layout="control" %}
         </fieldset>
         <fieldset>
             <legend>{% trans "E-mail content" %}</legend>