How to Send MMS on the iPhone

Here is a guide showing you how to send an MMS on the iPhone. The stock iPhone SMS app doesn’t allow you to do so, so this is a way to do it through the email app.
Send the email to the following numbers.
You will need to enter the 10 digit number @ ?. Use like this 9205551212@einsteinmms.com
US Based Carriers:
Alltel = xxxxxxxxxx@message.alltel.com
Amp’d Mobile
= xxxxxxxxxx@vtext.com
AT&T = xxxxxxxxxx@mms.att.net
Boost Mobile = xxxxxxxxxx@myboostmobile.com
Centennial Wireless = xxxxxxxxxx@myblue.com (added by kcirrab-this is accurate for i have centennial)
Cingular (AT&T) = xxxxxxxxxx@mms.mycingular.com
Einstein PCS = xxxxxxxxxx@einsteinmms.com
Nextel = xxxxxxxxxx@messaging.nextel.com
Sprint = xxxxxxxxxx@messaging.sprintpcs.com or xxxxxxxxxx@pm.sprint.com
T-Mobile = xxxxxxxxxx@tmomail.net
US Cellular = xxxxxxxxxx@mms.uscc.net
Verizon Wireless = xxxxxxxxxx@vzwpix.com
Virgin Mobile = xxxxxxxxxx@vmobl.com
Foreign Carriers:
Aruba setar = xxxxxxxxxx@mas.aw
Bell Canada: xxxxxxxxxx@1x.bell.ca
Cellcom = xxxxxxxxxx@cellcom.quiktxt.com
Digicel Aruba = xxxxxxxxxx@digitextaw.com
Digicel Curacao= xxxxxxxxxx@digitextcu.com
Digicel Barbados= xxxxxxxxxx@digitextbb.com
Digicel Bonaire= xxxxxxxxxx@digitextbo.com
Digicel Cayman= xxxxxxxxxx@digitextky.com
Digicel Grenada= xxxxxxxxxx@digitextgd.com
Digicel St. Lucia= xxxxxxxxxx@digitextlc.com
Digicel St. Vincent= xxxxxxxxxx@digitextvc.com
Fido = xxxxxxxxxx@fido.ca
Rogers Wireless (Canada) = xxxxxxxxxx@pcs.rogers.com
Suncom = xxxxxxxxxx@tms.suncom.com
Here are some more (may include some just txt #’s sorry I can’t test them all):
3 River Wireless = xxxxxxxxxx@sms.3rivers.net
Advantage Communications = xxxxxxxxxx@advantagepaging.com
Airtouch Pagers = xxxxxxxxxx@myairmail.com
Airtouch Pagers = xxxxxxxxxxr@alphapage.airtouch.com
Airtouch Pagers = xxxxxxxxxxr@airtouch.net
Airtouch Pagers = xxxxxxxxxxr@airtouchpaging.com
AlphNow pin@alphanow.net
Alltel = xxxxxxxxxx@alltelmessage.com
Alltel PCS = xxxxxxxxxx@message.alltel.com
Ameritech Paging = xxxxxxxxxx@paging.acswireless.com
Ameritech Paging = xxxxxxxxxx@pageapi.com
Ameritech Clearpath = xxxxxxxxxx@clearpath.acswireless.com
Amp’d Mobile = xxxxxxxxxx@vtext.com Arch Pagers (PageNet) = xxxxxxxxxx@archwireless.net
Arch Pagers (PageNet) = xxxxxxxxxx@epage.arch.com
Arch Pagers (PageNet) = xxxxxxxxxx@archwireless.net
AT&T PCS = xxxxxxxxxx@mobile.att.net
AT&T Pocketnet PCS = xxxxxxxxxx@dpcs.mobile.att.net
Beepwear = xxxxxxxxxx@beepwear.net
Bell Atlantic = xxxxxxxxxx@message.bam.com
Bell South (Blackberry) = number@bellsouthtips.com
Bell South = xxxxxxxxxx@sms.bellsouth.com
Bell South = xxxxxxxxxx@wireless.bellsouth.com
Bell South = xxxxxxxxxx@blsdcs.net
Carolina Mobile Communications = xxxxxxxxxx@cmcpaging.com
Cellular One East Coast = xxxxxxxxxx@phone.cellone.net
Cellular One South West = xxxxxxxxxx@swmsg.com
Cellular One PCS = xxxxxxxxxx@paging.cellone-sf.com
Cellular One = xxxxxxxxxx@mobile.celloneusa.com
Cellular One = xxxxxxxxxx@cellularone.txtmsg.com
Cellular One = xxxxxxxxxx@cellularone.textmsg.com
Cellular One = xxxxxxxxxx@cell1.textmsg.com
Cellular One = xxxxxxxxxx@message.cellone-sf.com
Cellular One = xxxxxxxxxx@sbcemail.com
Cellular South = xxxxxxxxxx@csouth1.com
Central Vermont Communications = xxxxxxxxxx@cvcpaging.com
Cingular Wirelss = xxxxxxxxxx@mycingular.textmsg.com
Cingular Wirelss = xxxxxxxxxx@mobile.mycingular.com
Cingular Wirelss = xxxxxxxxxx@mobile.mycingular.net
Clearnet = xxxxxxxxxx@msg.clearnet.com
Comcast = xxxxxxxxxx@comcastpcs.textmsg.com
Communication Specialists = xxxxxxxxxx@pageme.comspeco.net
Communication Specialist Companies pin@pager.comspeco.com
Cook Paging = xxxxxxxxxx@cookmail.com
Digi-Page / Page Kansas = xxxxxxxxxx@page.hit.net
GrayLink / Porta-Phone = xxxxxxxxxx@epage.porta-phone.com
GTE = xxxxxxxxxx@airmessage.net
GTE = xxxxxxxxxx@gte.pagegate.net
GTE = xxxxxxxxxx@messagealert.com
Houston Cellular = xxxxxxxxxx@text.houstoncellular.net
Infopage Systems pinnumber@page.infopagesystems.com
The Indiana Paging Co last4digits@pager.tdspager.com
JSM Tele-Page pinnumber@jsmtel.com
Lauttamus Communication = xxxxxxxxxx@e-page.net
MCI Phone = xxxxxxxxxx@mci.com
MCI = xxxxxxxxxx@pagemci.com
Metrocall = xxxxxxxxxx@page.metrocall.com
Metrocall 2-way = xxxxxxxxxx@my2way.com
Mobilecomm = xxxxxxxxxx@mobilecomm.net
Morris Wireless = xxxxxxxxxx@beepone.net
Motient = xxxxxxxxxx@isp.com
Nextel = xxxxxxxxxx@messaging.nextel.com
Nextel = xxxxxxxxxx@page.nextel.com
Nextel = xxxxxxxxxx@nextel.com.br
Ntelos = xxxxxxxxxx@pcs.ntelos.com
Omnipoint = xxxxxxxxxx@omnipoint.com
Omnipoint = xxxxxxxxxx@omnipointpcs.com
OnlineBeep = xxxxxxxxxx@onlinebeep.net
Pacific Bell = xxxxxxxxxx@pacbellpcs.net
PageMart = xxxxxxxxxx@pagemart.net
PageMart Advanced /2way = xxxxxxxxxx@airmessage.net
PageMart Canada = xxxxxxxxxx@pmcl.net
PageNet Canada = xxxxxxxxxx@pagegate.pagenet.ca
PageOne NorthWest = xxxxxxxxxx@page1nw.com
Primco = xxxxxxxxxx@primeco@textmsg.com
ProPage = xxxxxxxxxx@page.propage.net
Qwest = xxxxxxxxxx@qwestmp.com
RAM Page = xxxxxxxxxx@ram-page.com
Rogers Canada = xxxxxxxxxx@pcs.rogers.com
Satellink = xxxxxxxxxx.pageme@satellink.net
SBC Ameritech Paging = xxxxxxxxxx@paging.acswireless.com
Skytel Pagers = 7digitpinnumber@skytel.com
Skytel Pagers = xxxxxxxxxx@email.skytel.com
Southern LINC = xxxxxxxxxx@page.southernlinc.com
Southwestern Bell = xxxxxxxxxx@email.swbw.com
Sprint = xxxxxxxxxx@sprintpaging.com or phonenumber@pm.sprint.com
Sprint PCS = xxxxxxxxxx@messaging.sprintpcs.com or phonenumber@pm.sprint.com
ST Paging pin@page.stpaging.com
SunCom = xxxxxxxxxx@tms.suncom.com
SunCom = xxxxxxxxxx@suncom1.com
T-Mobile = xxxxxxxxxx@tmomail.net
T-Mobile = xxxxxxxxxx@voicestream.net
Teletouch = xxxxxxxxxx@pageme.teletouch.com
TSR Wireless = xxxxxxxxxx@alphame.com
TSR Wireless = xxxxxxxxxx@beep.com
US Cellular = xxxxxxxxxx@email.uscc.net
US West = xxxxxxxxxx@uswestdatamail.com
Verizon Pagers = xxxxxxxxxx@myairmail.com
Verizon PCS = xxxxxxxxxx@vtext.com
Verizon PCS = xxxxxxxxxx@myvzw.com
VoiceStream / T-Mobile = xxxxxxxxxx@voicestream.net
WebLink Wiereless = xxxxxxxxxx@airmessage.net
WebLink Wiereless = xxxxxxxxxx@pagemart.net
Wyndtell = xxxxxxxxxx@wyndtell.com
EDIT:
MORE NUMBERS
g3 Rivers Wireless number@sms.3rivers.net
ACS Wireless number@paging.acswireless.com
Advantage Communications number@advantagepaging.com
Airtouch Pagers number@myairmail.com
Airtouch Pagers number@alphapage.airtouch.com
Airtouch Pagers number@airtouch.net
Airtouch Pagers number@airtouchpaging.com
AlphNow pin@alphanow.net
Alltel number@alltelmessage.com
Alltel PCS number@message.alltel.com
Ameritech Paging number@paging.acswireless.com
Ameritech Paging number@pageapi.com
Ameritech Clearpath number@clearpath.acswireless.com
Ameritech Clearpath number@clearpath.acswireless.com
American Messaging (SBC/Ameritech) number@page.americanmessaging.net
Andhra Pradesh Airtel number@airtelap.com
Arch Pagers (PageNet) number@archwireless.net
Arch Pagers (PageNet) number@epage.arch.com
Arch Pagers (PageNet) number@archwireless.net
AT&T Free2Go number@mmode.com
AT&T PCS number@mobile.att.net
AT&T Pocketnet PCS number@dpcs.mobile.att.net
Beepwear number@beepwear.net
BeeLine GSM number@sms.beemail.ru
Bell Atlantic number@message.bam.com
Bell Canada number@txt.bellmobility.ca
Bell Canada number@bellmobility.ca
Bell Mobility (Canada) number@txt.bell.ca
Bell Mobility number@txt.bellmobility.ca
Bell South (Blackberry) number@bellsouthtips.com
Bell South number@sms.bellsouth.com
Bell South number@wireless.bellsouth.com
Bell South number@blsdcs.net
Bell South number@bellsouth.cl
Bell South Mobility number@blsdcs.net
Blue Sky Frog number@blueskyfrog.com
Bluegrass Cellular number@sms.bluecell.com
Boost number@myboostmobile.com
BPL mobile number@bplmobile.com
Cable & wireless, Panama number@cwmovil.com
Carolina West Wireless number@cwwsms.com
Carolina Mobile Communications number@cmcpaging.com
Cellular One East Coast number@phone.cellone.net
Cellular One South West number@swmsg.com
Cellular One PCS number@paging.cellone-sf.com
Cellular One number@mobile.celloneusa.com
Cellular One number@cellularone.txtmsg.com
Cellular One number@cellularone.textmsg.com
Cellular One number@cell1.textmsg.com
Cellular One number@message.cellone-sf.com
Cellular One number@sbcemail.com
Cellular One West number@mycellone.com
Cellular South number@csouth1.com
Centennial Wireless number@cwemail.com
Central Vermont Communications number@cvcpaging.com
CenturyTel number@messaging.centurytel.net
Chennai RPG Cellular number@rpgmail.net
Chennai Skycell / Airtel number@airtelchennai.com
Cincinnati Bell number@mobile.att.net
Cingular number@cingularme.com
Cingular number@mycingular.com
Cingular number@mycingular.net
Cingular number@mms.cingularme.com
Cingular number@page.cingular.com
Cingular Wireless number@mycingular.textmsg.com
Cingular Wireless number@mobile.mycingular.com
Cingular Wireless number@mobile.mycingular.net
Cingular Wireless number@mycingular.textmsg.com
Cingular Wireless number@mobile.mycingular.com
Cingular Wireless number@mobile.mycingular.net
Clearnet number@msg.clearnet.com
Comcast number@comcastpcs.textmsg.com
Communication Specialists pin@pageme.comspeco.net
Communication Specialist Companies pin@pager.comspeco.com
Comviq number@sms.comviq.se
Cook Paging number@cookmail.com
Corr Wireless Communications number@corrwireless.net
Delhi Aritel number@airtelmail.com
Delhi Hutch number@delhi.hutch.co.in
Digi-Page / Page Kansas number@page.hit.net
Dobson Cellular Systems number@mobile.dobson.net
Dobson-Alex Wireless number@mobile.cellularone.com
Dobson-Cellular One number@mobile.cellularone.com
DT T-Mobile number@t-mobile-sms.de
Dutchtone / Orange-NL number@sms.orange.nl
Edge Wireless number@sms.edgewireless.com
EMT number@sms.emt.ee
Escotel number@escotelmobile.com
Fido number@fido.ca
Galaxy Corporation number.epage@sendabeep.net
GCS Paging number@webpager.us
Goa BPLMobil number@bplmobile.com
Golden Telecom number@sms.goldentele.com
GrayLink / Porta-Phone number@epage.porta-phone.com
GTE number@airmessage.net
GTE number@gte.pagegate.net
GTE number@messagealert.com
Gujarat Celforce number@celforce.com
Houston Cellular number@text.houstoncellular.net
Idea Cellular number@ideacellular.net
Infopage Systems pin@page.infopagesystems.com
Inland Cellular Telephone number@inlandlink.com
The Indiana Paging Co pin@pager.tdspager.com
IPIPI.COM number@opensms.ipipi.com
JSM Tele-Page pinnumber@jsmtel.com
Kerala Escotel number@escotelmobile.com
Kolkata Airtel number@airtelkol.com
Kyivstar number@smsmail.lmt.lv
Lauttamus Communication number@e-page.net
LMT number@smsmail.lmt.lv
Maharashtra BPL Mobile number@bplmobile.com
Maharashtra Idea Cellular number@ideacellular.net
Manitoba Telecom Systems number@text.mtsmobility.com
MCI Phone number@mci.com
MCI number@pagemci.com
Meteor number@mymeteor.ie
Meteor number@sms.mymeteor.ie
Metrocall number@page.metrocall.com
Metrocall 2-way number@my2way.com
Metro PCS number@mymetropcs.com
Metro PCS number@metropcs.sms.us
Microcell number@fido.ca
Midwest Wireless number@clearlydigital.com
MiWorld number@m1.com.sg
Mobilecom PA number@page.mobilcom.net
Mobilecomm number@mobilecomm.net
Mobileone number@m1.com.sg
Mobilfone number@page.mobilfone.com
Mobility Bermuda number@ml.bm
Mobistar Belgium number@mobistar.be
Mobitel Tanzania number@sms.co.tz
Mobtel Srbija number@mobtel.co.yu
Morris Wireless number@beepone.net
Motient number@isp.com
Movistar number@correo.movistar.net
Mumbai BPL Mobile number@bplmobile.com
Mumbai Orange number@orangemail.co.in
NBTel number@wirefree.informe.ca
Netcom number@sms.netcom.no
Nextel number@messaging.nextel.com
Nextel number@page.nextel.com
Nextel number@nextel.com.br
NPI Wireless number@npiwireless.com
Ntelos number@pcs.ntelos.com
O2 name@o2.co.uk
O2 number@o2imail.co.uk
O2 (M-mail) number@mmail.co.uk
Omnipoint number@omnipoint.com
Omnipoint number@omnipointpcs.com
One Connect Austria number@onemail.at
OnlineBeep number@onlinebeep.net
Optus Mobile number@optusmobile.com.au
Orange number@orange.net
Orange Mumbai number@orangemail.co.in
Orange – NL / Dutchtone number@sms.orange.nl
Oskar number@mujoskar.cz
P&T Luxembourg number@sms.luxgsm.lu
Pacific Bell number@pacbellpcs.net
PageMart pin@pagemart.net
PageMart Advanced /2way number@airmessage.net
PageMart Canada number@pmcl.net
PageNet Canada number@pagegate.pagenet.ca
PageOne NorthWest number@page1nw.com
PCS One number@pcsone.net
Pelephone Israel number@pelephone.net.il
Personal Communication sms@pcom.ru (number in subject line)
Pioneer / Enid Cellular number@msg.pioneerenidcellular.com
PlusGSM number@text.plusgsm.pl
Pondicherry BPL Mobile number@bplmobile.com
Powertel number@voicestream.net
Price Communications number@mobilecell1se.com
Primeco number@primeco@textmsg.com
Primtel number@sms.primtel.ru
ProPage number@page.propage.net
Public Service Cellular number@sms.pscel.com
Qualcomm name@pager.qualcomm.com
Qwest number@qwestmp.com
RAM Page number@ram-page.com
Rogers AT&T Wireless number@pcs.rogers.com
Rogers Canada number@pcs.rogers.com
Safaricom number@safaricomsms.com
Satelindo GSM number@satelindogsm.com
Satellink number.pageme@satellink.net
SBC Ameritech Paging number@paging.acswireless.com
SCS-900 number@scs-900.ru
SFR France number@sfr.fr
Skytel Pagers pin@skytel.com
Skytel Pagers number@email.skytel.com
Simple Freedom number@text.simplefreedom.net
Smart Telecom number@mysmart.mymobile.ph
Southern LINC number@page.southernlinc.com
Southwestern Bell number@email.swbw.com
Sprint number@sprintpaging.com
Sprint PCS number@messaging.sprintpcs.com
ST Paging pin@page.stpaging.com
SunCom number@tms.suncom.com
SunCom number@suncom1.com
Sunrise Mobile number@mysunrise.ch
Sunrise Mobile number@freesurf.ch
Surewest Communicaitons number@mobile.surewest.com
Swisscom number@bluewin.ch
T-Mobile number@tmomail.net
T-Mobile number@voicestream.net
T-Mobile Austria number@sms.t-mobile.at
T-Mobile Germany number@t-d1-sms.de
T-Mobile UK number@t-mobile.uk.net
Tamil Nadu BPL Mobile number@bplmobile.com
Tele2 Latvia number@sms.tele2.lv
Telefonica Movistar number@movistar.net
Telenor number@mobilpost.no
Teletouch number@pageme.teletouch.com
Telia Denmark number@gsm1800.telia.dk
Telus number@msg.telus.com
TIM number@timnet.com
Triton number@tms.suncom.com
TSR Wireless number@alphame.com
TSR Wireless number@beep.com
UMC number@sms.umc.com.ua
Unicel number@utext.com
Uraltel number@sms.uraltel.ru
US Cellular number@email.uscc.net
US Cellular number@uscc.textmsg.com
US West number@uswestdatamail.com
Uttar Pradesh Escotel number@escotelmobile.com
Verizon Pagers number@myairmail.com
Verizon PCS (SMS) number@vtext.com
Verizon PCS (MMS) number@myvzw.com
Verizon PCS (MMS) number@vswpix.com
Vessotel number@pager.irkutsk.ru
Virgin Mobile (CA) number@vmobile.ca
Virgin Mobile (US) number@vmobl.com
Virgin Mobile number@vxtras.com
Vodacom (S Africa) number@voda.co.za
Vodafone Italy number@sms.vodafone.it
Vodafone Japan number@c.vodafone.ne.jp
Vodafone Japan number@h.vodafone.ne.jp
Vodafone Japan number@t.vodafone.ne.jp
Vodafone Spain number@vodafone.es
Vodafone UK number@vodafone.net
VoiceStream / T-Mobile number@voicestream.net
WebLink Wireless number@airmessage.net
WebLink Wireless number@pagemart.net
WEBTEXT number@webtext.com
West Central Wireless number@sms.wcc.net
Western Wireless number@cellularonewest.com
Wildmist Wireless number@sms.wildmist.net
Wyndtell number@wyndtell.com