diff --git a/core/.coveragerc b/core/.coveragerc
new file mode 100644
index 0000000..14c1fba
--- /dev/null
+++ b/core/.coveragerc
@@ -0,0 +1,14 @@
+[run]
+source = .
+
+[report]
+fail_under = 100
+show_missing = True
+skip_covered = True
+omit =
+    */tests/*
+    */migrations/*
+    core/asgi.py
+    core/wsgi.py
+    core/settings.py
+    manage.py
\ No newline at end of file
diff --git a/core/inventory/serializers.py b/core/inventory/serializers.py
index fd39c3a..5a26623 100644
--- a/core/inventory/serializers.py
+++ b/core/inventory/serializers.py
@@ -3,12 +3,21 @@ from rest_framework import serializers
 
 from files.models import File
 from inventory.models import Event, Container, Item
+from mail.models import EventAddress
+
+
+class EventAdressSerializer(serializers.ModelSerializer):
+    class Meta:
+        model = EventAddress
+        fields = ['address']
 
 
 class EventSerializer(serializers.ModelSerializer):
+    addresses = EventAdressSerializer(many=True, required=False)
+
     class Meta:
         model = Event
-        fields = ['eid', 'slug', 'name', 'start', 'end', 'pre_start', 'post_end']
+        fields = ['eid', 'slug', 'name', 'start', 'end', 'pre_start', 'post_end', 'addresses']
         read_only_fields = ['eid']
 
 
diff --git a/core/inventory/tests/v2/test_events.py b/core/inventory/tests/v2/test_events.py
index 7973313..affbd0e 100644
--- a/core/inventory/tests/v2/test_events.py
+++ b/core/inventory/tests/v2/test_events.py
@@ -54,3 +54,15 @@ class EventTestCase(TestCase):
         response = client.delete(f'/api/2/events/{event.eid}/')
         self.assertEqual(response.status_code, 204)
         self.assertEqual(len(Event.objects.all()), 1)
+
+    def test_items2(self):
+        from mail.models import EventAddress
+        event1 = Event.objects.create(slug='TEST1', name='Event')
+        EventAddress.objects.create(event=Event.objects.get(slug='TEST1'), address='foo@bar.baz')
+        response = self.client.get('/api/2/events/')
+        self.assertEqual(response.status_code, 200)
+        self.assertEqual(1, len(response.json()))
+        self.assertEqual('TEST1', response.json()[0]['slug'])
+        self.assertEqual('Event', response.json()[0]['name'])
+        self.assertEqual(1, len(response.json()[0]['addresses']))
+
diff --git a/core/mail/migrations/0005_alter_eventaddress_event.py b/core/mail/migrations/0005_alter_eventaddress_event.py
new file mode 100644
index 0000000..30b79bf
--- /dev/null
+++ b/core/mail/migrations/0005_alter_eventaddress_event.py
@@ -0,0 +1,20 @@
+# Generated by Django 4.2.7 on 2024-11-03 18:30
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('inventory', '0004_alter_event_created_at_alter_item_created_at'),
+        ('mail', '0004_alter_emailattachment_file'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='eventaddress',
+            name='event',
+            field=models.ForeignKey(null=True, on_delete=django.db.models.deletion.SET_NULL, related_name='addresses', to='inventory.event'),
+        ),
+    ]
diff --git a/core/mail/models.py b/core/mail/models.py
index 4bd0973..378854b 100644
--- a/core/mail/models.py
+++ b/core/mail/models.py
@@ -31,7 +31,7 @@ class Email(SoftDeleteModel):
 
 class EventAddress(models.Model):
     id = models.AutoField(primary_key=True)
-    event = models.ForeignKey(Event, models.SET_NULL, null=True)
+    event = models.ForeignKey(Event, models.SET_NULL, null=True, related_name='addresses')
     address = models.CharField(max_length=255)
 
 
diff --git a/core/mail/protocol.py b/core/mail/protocol.py
index cfd25ce..a87f1a6 100644
--- a/core/mail/protocol.py
+++ b/core/mail/protocol.py
@@ -1,4 +1,5 @@
 import logging
+from re import match
 
 import aiosmtplib
 from channels.layers import get_channel_layer
@@ -10,6 +11,10 @@ from notify_sessions.models import SystemEvent
 from tickets.models import IssueThread
 
 
+class SpecialMailException(Exception):
+    pass
+
+
 def find_quoted_printable(s, marker):
     positions = [i for i in range(len(s)) if s.lower().startswith('=?utf-8?' + marker + '?', i)]
     for pos in positions:
@@ -180,13 +185,13 @@ def receive_email(envelope, log=None):
     header_in_reply_to = parsed.get('In-Reply-To')
     header_message_id = parsed.get('Message-ID')
 
-    if header_from != envelope.mail_from:
-        log.warning("Header from does not match envelope from")
-        log.info(f"Header from: {header_from}, envelope from: {envelope.mail_from}")
+    if match(r'^([a-zA-Z ]*<)?MAILER-DAEMON@', header_from) and envelope.mail_from.strip("<>") == "":
+        log.warning("Ignoring mailer daemon")
+        raise SpecialMailException("Ignoring mailer daemon")
 
-    if header_to != envelope.rcpt_tos[0]:
-        log.warning("Header to does not match envelope to")
-        log.info(f"Header to: {header_to}, envelope to: {envelope.rcpt_tos[0]}")
+    if Email.objects.filter(reference=header_message_id).exists():  # break before issue thread is created
+        log.warning("Email already exists")
+        raise Exception("Email already exists")
 
     recipient = envelope.rcpt_tos[0].lower() if envelope.rcpt_tos else header_to.lower()
     sender = envelope.mail_from if envelope.mail_from else header_from
@@ -233,7 +238,7 @@ Your c3lf (Cloakroom + Lost&Found) Team'''.format(active_issue_thread.short_uuid
             active_issue_thread.state = 'pending_open'
             active_issue_thread.save()
 
-    return email, new, reply
+    return email, new, reply, active_issue_thread
 
 
 class LMTPHandler:
@@ -255,7 +260,7 @@ class LMTPHandler:
         content = None
         try:
             content = envelope.content
-            email, new, reply = await receive_email(envelope, log)
+            email, new, reply, thread = await receive_email(envelope, log)
             log.info(f"Created email {email.id}")
             systemevent = await database_sync_to_async(SystemEvent.objects.create)(type='email received',
                                                                                    reference=email.id)
@@ -263,14 +268,20 @@ class LMTPHandler:
             channel_layer = get_channel_layer()
             await channel_layer.group_send(
                 'general', {"type": "generic.event", "name": "send_message_to_frontend", "event_id": systemevent.id,
-                            "message": "email received"}
-            )
+                            "message": "email received"})
             log.info(f"Sent message to frontend")
             if new and reply:
                 log.info('Sending message to %s' % reply['To'])
                 await send_smtp(reply)
                 log.info("Sent auto reply")
 
+            return '250 Message accepted for delivery'
+        except SpecialMailException as e:
+            import uuid
+            random_filename = 'special-' + str(uuid.uuid4())
+            with open(random_filename, 'wb') as f:
+                f.write(content)
+            log.warning(f"Special mail exception: {e} saved to {random_filename}")
             return '250 Message accepted for delivery'
         except Exception as e:
             from hashlib import sha256
diff --git a/core/mail/tests/v2/test_mails.py b/core/mail/tests/v2/test_mails.py
index ac03bac..3df56ca 100644
--- a/core/mail/tests/v2/test_mails.py
+++ b/core/mail/tests/v2/test_mails.py
@@ -760,7 +760,6 @@ dGVzdGltYWdl
         response = self.client.post(f'/api/2/tickets/{issue_thread.id}/reply/', {
             'message': 'test'
         })
-        aiosmtplib.send.assert_called_once()
         self.assertEqual(response.status_code, 201)
         self.assertEqual(5, len(Email.objects.all()))
         self.assertEqual(5, len(Email.objects.filter(issue_thread=issue_thread)))
@@ -776,6 +775,7 @@ dGVzdGltYWdl
         self.assertEqual('test subject', IssueThread.objects.all()[0].name)
         self.assertEqual('pending_new', IssueThread.objects.all()[0].state)
         self.assertEqual(None, IssueThread.objects.all()[0].assigned_to)
+        aiosmtplib.send.assert_called_once()
 
     def test_mail_4byte_unicode_emoji(self):
         from aiosmtpd.smtp import Envelope
diff --git a/core/requirements.dev.txt b/core/requirements.dev.txt
index 8e68f67..146aa37 100644
--- a/core/requirements.dev.txt
+++ b/core/requirements.dev.txt
@@ -1,3 +1,6 @@
+aiodns==3.2.0
+aiohttp==3.9.5
+aiosignal==1.3.1
 aiosmtpd==1.4.4.post2
 aiosmtplib==3.0.1
 anyio==4.1.0
@@ -28,6 +31,7 @@ django-rest-knox==4.2.0
 django-soft-delete==0.9.21
 djangorestframework==3.14.0
 drf-yasg==1.21.7
+frozenlist==1.4.1
 h11==0.14.0
 hyperlink==21.0.0
 idna==3.4
@@ -38,11 +42,13 @@ Jinja2==3.1.2
 MarkupSafe==2.1.3
 msgpack==1.0.7
 msgpack-python==0.5.6
+multidict==6.0.5
 openapi-codec==1.3.2
 packaging==23.2
 Pillow==10.1.0
 pyasn1==0.5.1
 pyasn1-modules==0.3.0
+pycares==4.4.0
 pycparser==2.21
 pyOpenSSL==23.3.0
 python-dotenv==1.0.0
@@ -65,4 +71,5 @@ urllib3==2.1.0
 uvicorn==0.24.0.post1
 watchfiles==0.21.0
 websockets==12.0
+yarl==1.9.4
 zope.interface==6.1
diff --git a/core/requirements.prod.txt b/core/requirements.prod.txt
index 6a4f32a..14bdc0f 100644
--- a/core/requirements.prod.txt
+++ b/core/requirements.prod.txt
@@ -1,3 +1,6 @@
+aiodns==3.2.0
+aiohttp==3.9.5
+aiosignal==1.3.1
 aiosmtpd==1.4.4.post2
 aiosmtplib==3.0.1
 asgiref==3.7.2
diff --git a/core/tickets/api_v2.py b/core/tickets/api_v2.py
index f8f746e..596bd9b 100644
--- a/core/tickets/api_v2.py
+++ b/core/tickets/api_v2.py
@@ -10,6 +10,7 @@ from asgiref.sync import async_to_sync
 from channels.layers import get_channel_layer
 
 from core.settings import MAIL_DOMAIN
+from inventory.models import Event
 from mail.models import Email
 from mail.protocol import send_smtp, make_reply, collect_references
 from notify_sessions.models import SystemEvent