diff --git a/django_mailbox/models.py b/django_mailbox/models.py
index a27b5b25..d98ba1fd 100644
--- a/django_mailbox/models.py
+++ b/django_mailbox/models.py
@@ -470,15 +470,18 @@ def get_new_mail(self, condition=None):
         connection = self.get_connection()
         if not connection:
             return
-        for message in connection.get_message(condition):
-            msg = self.process_incoming_message(message)
-            if msg is not None:
-                yield msg
-        self.last_polling = now()
-        if django.VERSION >= (1, 5):  # Django 1.5 introduces update_fields
-            self.save(update_fields=['last_polling'])
-        else:
-            self.save()
+        try:
+            for message in connection.get_message(condition):
+                msg = self.process_incoming_message(message)
+                if msg is not None:
+                    yield msg
+            self.last_polling = now()
+            if django.VERSION >= (1, 5):  # Django 1.5 introduces update_fields
+                self.save(update_fields=['last_polling'])
+            else:
+                self.save()
+        finally:
+            connection.close()
 
     @staticmethod
     def get_new_mail_all_mailboxes(args=None):
diff --git a/django_mailbox/transports/base.py b/django_mailbox/transports/base.py
index a90af9f7..57679f8a 100644
--- a/django_mailbox/transports/base.py
+++ b/django_mailbox/transports/base.py
@@ -9,3 +9,6 @@ def get_email_from_bytes(self, contents):
         message = email.message_from_bytes(contents)
 
         return message
+
+    def close(self):
+        pass
\ No newline at end of file
diff --git a/django_mailbox/transports/imap.py b/django_mailbox/transports/imap.py
index 2599adad..5b0d2dc8 100644
--- a/django_mailbox/transports/imap.py
+++ b/django_mailbox/transports/imap.py
@@ -6,13 +6,6 @@
 from .base import EmailTransport, MessageParseError
 
 
-# By default, imaplib will raise an exception if it encounters more
-# than 10k bytes; sometimes users attempt to consume mailboxes that
-# have a more, and modern computers are skookum-enough to handle just
-# a *few* more messages without causing any sort of problem.
-imaplib._MAXLINE = 1000000
-
-
 logger = logging.getLogger(__name__)
 
 
@@ -56,6 +49,14 @@ def connect(self, username, password):
         else:
             self.server.select()
 
+    def close(self):
+        try:
+            self.server.close()
+            self.server.logout()
+        except (imaplib.IMAP4.error, OSError) as  e:
+            logger.warning(f'Failed to close IMAP connection, ignoring: {e}')
+            pass
+
     def _get_all_message_ids(self):
         # Fetch all the message uids
         response, message_ids = self.server.uid('search', None, 'ALL')