IPhone 5 on Net 10 cannot send MMS?

I recently switched to Net 10 and I'm having a problem with my mms. My data is working fine and I can receive mms. The problem I'm having is that my phone shows that my pictures have been sent but no one receives them. The APN settings I'm using are as follows:

Data:
APN: tfdata

MMS:
APN: tfdata
MMSC: http://mms-tf.net
MMS Proxy: mms3.tracfone.com:80
MMS max message size:1048576

Any advice?

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