I am using the code below to try to send an MMS message with python-messaging https://github.com/pmarti/python-messaging/blob/master/doc/tutorial/mms.rst Although the connection seems to go smoothly I get the following response from the mmsc:

PROXY RESPONSE HTTP/1.0 200 OK
content-type: application/vnd.wap.mms-message
content-length: 59
Connection: close
Date: Sat, 05 Jan 2019 16:36:44 GMT
Server: Mavenir Web Application Server���1234�����,�Failed to handle HTTP request in Mm1Server

Does, anyone have an idea on what the problem might be and how I can fix it? Here is my code:

from messaging.mms.message import MMSMessage, MMSMessagePagemms = MMSMessage()
mms.headers['To'] = '+212XXXXXXX/TYPE=PLMN'
mms.headers['Message-Type'] = 'm-send-req'
mms.headers['Subject'] = 'Test python-messaging.mms'slide1 = MMSMessagePage()
slide1.add_image('/home/richard/screensaver/TolleConscQte.jpg')
slide1.add_text('This first slide, is a step towards enlightenment.')slide2 = MMSMessagePage()
slide2.set_duration(4500)
slide2.add_image('/home/richard/screensaver/TollePastALL.jpg', 1500)
slide2.add_text('This second slide is a second step towards enlightenment.', 500, 3500)mms.add_page(slide1)
mms.add_page(slide2)payload = mms.encode()## sending the MMSfrom cStringIO import StringIO
import socketgw_host, gw_port = "10.188.239.143", 80 #tings = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect((gw_host, gw_port))
s.send("POST %s HTTP/1.0\r\n" % "http://wholesale.mmsmvno.com/mms/wapenc")
s.send("Content-Type: application/vnd.wap.mms-message\r\n")
s.send("Content-Length: %d\r\n\r\n" % len(payload))s.sendall(payload)buf = StringIO()while True:data = s.recv(4096)if not data:breakbuf.write(data)s.close()
data = buf.getvalue()
buf.close()print "PROXY RESPONSE", data

I ran into this same error. The error is with the encoded MMS PDU, not the http request. I was able to get this to work by explicitly setting the From header:

mms.headers['From'] = ''

This will cause the python-messaging library to set the From header to Insert-address-token.

I used this test file for debugging (just change the To phone number).

Its also fine to use a normal http client. Just make sure you are setting Content-Type and Content-Length.