List of free email to SMS gateways

[Neo]

US

Alltel
[10-digit phone number]@message.alltel.com

AT&T (formerly Cingular)
[10-digit phone number]@txt.att.net
[10-digit phone number]@mms.att.net (MMS)
[10-digit phone number]@cingularme.com

Boost Mobile
[10-digit phone number]@myboostmobile.com

Nextel (now Sprint Nextel)
[10-digit telephone number]@messaging.nextel.com

Sprint PCS (now Sprint Nextel)
[10-digit phone number]@messaging.sprintpcs.com
[10-digit phone number]@pm.sprint.com (MMS)

T-Mobile
[10-digit phone number]@tmomail.net

US Cellular
[10-digit phone number]email.uscc.net (SMS)
[10-digit phone number]@mms.uscc.net (MMS)

Verizon
[10-digit phone number]@vtext.com
[10-digit phone number]@vzwpix.com (MMS)

Virgin Mobile USA
[10-digit phone number]@vmobl.com

International
7-11 Speakout (USA GSM)
[email protected]

Airtel (Karnataka, India)
[email protected]

Airtel Wireless (Montana, USA)
[email protected]

Alaska Communications Systems
[email protected]

Aql
[email protected]

AT&T Enterprise Paging
[email protected]

BigRedGiant Mobile Solutions
[email protected]

Bell Mobility & Solo Mobile (Canada)
[email protected]

BPL Mobile (Mumbai, India)
[email protected]

Cellular One (Dobson)
[email protected]

Cingular (Postpaid)
[email protected]

Centennial Wireless
[email protected]

Cingular (GoPhone prepaid)
[email protected] (SMS)

Claro (Brasil)
[email protected]

Claro (Nicaragua)
[email protected]

Comcel
[email protected]

Cricket
[email protected] (SMS)

CTI
[email protected]

Dialog GSM (Sri Lanka)
[email protected]

Emtel (Mauritius)
[email protected]

Fido (Canada)
[email protected]

General Communications Inc.
[email protected]

Globalstar (satellite)
[email protected]

Helio
[email protected]

Illinois Valley Cellular
[email protected]

Iridium (satellite)
[email protected]

Iusacell
[email protected]

i wireless
[email protected]

Koodo Mobile (Canada)
[email protected]

LMT (Latvia)
[email protected]

Meteor (Ireland)
[email protected]

Mero Mobile (Nepal)
[email protected]

MetroPCS
[email protected]

Movicom (Argentina)
[email protected]

Mobitel (Sri Lanka)
[email protected]

Movistar (Colombia)
[email protected]

MTN (South Africa)
[email protected]

MTS (Canada)
[email protected]

Nextel (United States)
[email protected]

Nextel (Argentina)
[email protected]

Orange Polska (Poland)
[email protected]

Personal (Argentina)
[email protected]

Plus GSM (Poland)
+[email protected]

President’s Choice (Canada)
[email protected]

Qwest
[email protected]

Rogers (Canada)
[email protected]

SL Interactive (Australia)
[email protected]

Sasktel (Canada)
[email protected]

Setar Mobile email (Aruba)
[email protected]

Suncom
[email protected]

T-Mobile (Austria)
[email protected]

T-Mobile (UK)
[email protected]

Telus Mobility (Canada)
[email protected]

Thumb Cellular
[email protected]

Tigo (Formerly Ola)
[email protected]

Tracfone (prepaid)
[email protected]

Unicel
[email protected]

Virgin Mobile (Canada)
[email protected]

Vodacom (South Africa)
[email protected]

Vodafone (Italy)
[email protected]

YCC
[email protected]

MobiPCS (Hawaii only)
[email protected]

If you know services that are not listed here, please add them on the same topic.

[Neo]

If yours is not listed, check these sites as well.
http://www.topbits.com/how-to-send-text ... -free.html
http://www.mutube.com/projects/open-ema ... eway-list/
http://www.notepage.net/smtp.htm