Post from
http://uneasysilence.com/archive/2007/07/11328/
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****** of that you can’t send an MMS from the iPhone? Although we are fairly certain that the feature will surface in an update sometime in the next month or two, there is a work around that will enable pseudo MMS capabilities to your iPhone.
Since you can email pictures you have taken, to send a picture to any cellphone just email it to the recipients MMS email address. All you will need to do is enter the recipients 10 digit number into the appropriate carrier field.
US Based Carriers:
Alltel = xxxxxxxxxx@message.alltel.com
AT&T = xxxxxxxxxx@mms.att.net
Boost Mobile = xxxxxxxxxx@myboostmobile.com
Cingular (AT&T) = xxxxxxxxxx@mms.mycingular.com
Einstein PCS = xxxxxxxxxx@einsteinmms.com
Sprint = xxxxxxxxxx@messaging.sprintpcs.com
T-Mobile = xxxxxxxxxx@tmomail.net
US Cellular = xxxxxxxxxx@mms.uscc.net
Verizon Wireless = xxxxxxxxxx@vzwpix.com
Virgin Mobile = xxxxxxxxxx@vmobl.com