I am using a TELUS Samsung ATIV S on Koodo's network and I cannot get the MMS to work. All other data services work flawlessly.
The Koodo representatives I spole to have not been able to resolve this for me and now that they have their own Windows Phone 8 device, I am surprise that there isn't a solution for this.
I got the setting from http://www.unlockit.co.nz/unlockit/
and found a thread in here that suggested to add ":80" after MMSC in the URL (http://aliasredirect.net/proxy/koodo/...
). None of these works for me.