a couple small adjustments here and there.

src/paperless_mail/migrations/0003_auto_20201118_1940.py

@@ -0,0 +1,23 @@
+# Generated by Django 3.1.3 on 2020-11-18 19:40
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('paperless_mail', '0002_auto_20201117_1334'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='mailaccount',
+            name='imap_port',
+            field=models.IntegerField(blank=True, help_text='This is usually 143 for unencrypted and STARTTLS connections, and 993 for SSL connections.', null=True),
+        ),
+        migrations.AlterField(
+            model_name='mailrule',
+            name='name',
+            field=models.CharField(max_length=256, unique=True),
+        ),
+    ]