Collect a timestamp from emails + migration

django_mailbox/migrations/0009_message_timestamp.py

@@ -0,0 +1,20 @@
+# Generated by Django 3.1.4 on 2022-10-17 11:13
+
+from django.db import migrations, models
+import django.utils.timezone
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('django_mailbox', '0008_auto_20190219_1553'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='message',
+            name='timestamp',
+            field=models.DateTimeField(default=django.utils.timezone.now, verbose_name='Timestamp'),
+            preserve_default=False,
+        ),
+    ]