can you forward all mms from iphone to an app or something else, or

download mms through wifi? I have an iphone 3g but I've disabled my data usage cause my plan has no data. I'm on T-mobile but I jailbroke my iphone. So, I can only receive data/pic messages or send them when I turn on cellular data . problem is I get charged for that. Is there a way to have these MMS get forwarded to an email, an app, or any other thing?
Or does anyone have any bright ideas on this situation?
Or a better question yet but I think the answer is no... can I download these MMS files through wifi?
I just think it's lame for everyone to send me a pic they would have to keep a different contact on their phone as an app number.
 
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