PMMail, PMBatchMail, and PMBounceManager objects, as well as Django email backend (postmark.django_backend.EmailBackend) for Postmark (http://postmarkapp.com)
CONTRIBUTORS:
Dave Martorana (themartorana)
Bill Jones (oraclebill)
Richard Cooper (frozenskys)
Miguel Araujo (maraujop)
Patrick Lauber (digi604)
Brian McFadden (brimcfadden)
Joel Ryan (joelryan2k)
Ben Hodgson (benhodgson)
Dmitry Golomidov (deeGraYve)
Matt Robenolt (mattrobenolt)
Maxime Bouroumeau-Fuseau (maximebf)
James Arthur (thruflo)
(Did I miss anyone?)
PYTHON INFORMATION:
 Works on Python 2.4 and better. Versions
 2.4 and 2.5 will require the "simplejson" 
 library from http://code.google.com/p/simplejson/
 Python 2.6 has JSON support built in.
CHANGE LOG:
 Version 0.3.2
 - Uses simplejson if installed for faster C _speedups
 - PMBatchMail properly chunks large message sets
 - Django backend uses PMBatchMail properly
 - Use https by default
 - Proper testing API key out of the box
 - Cleaned up some PMBatchMail properties
 - Added a few utility methods (add_message, remove_message) to PMBatchMail
 - Added proper value checking to PMBatchMail pre-send
 - A BIG THANKS to all new contributors!
 Version 0.3.1
 - Added batch-messaging support (PMBatchMail object) (deeGraYve)
 See http://developer.postmarkapp.com/developer-build.html#batching-messages
 Version 0.2.3
 - Merged in support for adding a tag through the Django backend (joelryan2k)
 - Merged in support for POSTMARK_TEST_MODE overriding and beter settings defaults (benhodgson)
 Version 0.2.2
 - Merged in email mime import fix from brimcfadden
 
 Version 0.2.1
 - Merged in POSTMARK_TEST_MODE Django setting from maraujop
 
 Version 0.2.0
 - Merged with frozenskys/master to bring in PMBounceManager
 - Support for multiple to/cc (limit: 20 per)
 - Changed .recipient to .to (legacy support for .recipient left in)
 - Tag support (.tag) added
 - Fixed the email endpoint
 - Fixed a Django backend issue for multiple recipients (max 20)
 Version 0.1.6
 - Added a new PMBounceManager Class that allows easy access to the PostMark
 bounce API.
 
 Version 0.1.5
 - Added ".cc" property for carbon copy recipients. Changed django_backend to 
 support multiple recipients, and to use "to" rather than "recipients" on the django
 mail object to prevent accidental leakage of BCC recipients.
 
 Version 0.1.4
 - Added ".reply_to" property. The "ReplyTo" custom header is unallowed by Postmark 
 now, and their documentation has been updated to reflect the change.
 http://developer.postmarkapp.com
 Version 0.1.3
 - Major fix to the way properties were being used, fixes doc strings in properties
 - "custom_headers" is now always a dict, even if set to None
 Version 0.1.2
 - Added 'custom_headers' property (must be a dictionary) to PMMail object
 - Added optional 'test' argument to send function to print JSON message instead of actually sending it
 
 Version 0.1.1:
 - Initial release
USAGE:
 Make sure you have a Postmark account. Visit
 http://postmarkapp.com to sign up for an account.
 Requires a Postmark API key.
 Import postmark.PMMail to use Postmark. Check
 class documentation on PMMail object for more 
 information.
 
DJANGO:
 The library can be used stand-alone with Django. You can also
 add the settings:
 
 POSTMARK_API_KEY = 'your-key'
 POSTMARK_SENDER = 'sender@signature.com'
 POSTMARK_TEST_MODE = [True/False]
 
 to your settings.py file, and when you create a new PMMail object,
 it will grab the API key and sender automatically. Make sure the 
 sender email address is one of your Sender Signature email addresses
 in Postmark. You can also customize the name on the sender by 
 changing the format from 'email@address.com' to 
 'Sender Name <email@address.com>' as long as the email part is 
 part of a Sender Signature in Postmark.
 
 Using POSTMARK_TEST_MODE=True will not actually send the email, but
 instead dump the JSON packet that would be sent to Postmarkapp.com.
 By default this setting is False, and if not specified, will 
 be assumed to be False.
 To reoute all Django E-Mail functions like send_mail() and
 mail_admins() through postmark use the following setting:
 EMAIL_BACKEND = 'postmark.django_backend.EmailBackend'
 But keep in mind that even when using standard Django functions
 the sender must be registered with postmarkapp.com.
 
EXCEPTIONS:
 PMMailMissingValueException(Exception):
 One of the required values for attempting a send request is missing
 PMMailSendException(Exception):
 Base Postmark send exception
 PMMailUnauthorizedException(PMMailSendException):
 401: Unathorized sending due to bad API key
 PMMailUnprocessableEntityException(PMMailSendException):
 422: Unprocessable Entity - usually an exception with either the sender
 not having a matching Sender Signature in Postmark. Read the message
 details for further information
 PMMailServerErrorException(PMMailSendException):
 500: Internal error - this is on the Postmark server side. Errors are
 logged and recorded at Postmark.
 PMMailURLException(PMMailSendException):
 A URLError was caught - usually has to do with connectivity
 and the ability to reach the server. The inner_exception will
 have the base URLError object.
 
TODO: 
 Add automatic multipart emails via regex stripping of HTML tags from html_body
 if the .multipart property is set to True
 Refactor PMBounceManager Object and improve error handling within it.
 Add PMBounceManager example to the Django test.