Add support for Delta

Also add an undocumented mailbox driver for a directory of files
for ease of testing (this could probably become a maildir driver
with a bit more work).

Remove unecessary decode calls from the message traversal.

1 files changed, 3 insertions, 2 deletions

diff --git a/README.rst b/README.rst
index 8715aa6..dd22c95 100644
--- a/README.rst
+++ b/README.rst
@@ -14,9 +14,10 @@ even if an email is seen multiple times.
 
 It currently understands emails from the following senders:
 
-* United Airlines
-* Marriott hotels (when booked directly)
+* Delta Air Lines
 * Eventbrite
+* Marriott hotels (when booked directly)
+* United Airlines
 
 It is simple to add support for more types of emails, and additions
 are welcome.