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Can anyone recommend any good SMS gateways for sending and receiving SMS using C #?

Has anyone used any in the UK, and if so, were they good?

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Clickatell is a popular SMS gateway. It works in over 200 countries.

Their API offers a choice of connection options through: HTTP / S, SMPP, SMTP, FTP, XML, SOAP, COM object.

The HTTP / S method is as simple as this: http://api.clickatell.com/http/sendmsg?to=NUMBER&msg=Message+Body+Here ( Clickatell API Guide ).

The SMTP method consists of sending a text email message: sms@messaging.clickatell.com with the following body:

 user: xxxxx password: xxxxx api_id: xxxxx to: 448311234567 text: Meet me at home

As for incoming SMS messages, you will need to open the interface via: HTTP, SMPP, SOAP or FTP. For example, if you use an HTTP GET and provide this Clickatell URL: http://www.yourdomain.com/sms/sms.asp , then Clickatell will send you this HTTP GET with each incoming SMS:

 https://www.yourdomain.com/sms/sms.asp? api_id=12345& from=279991235642& to=27123456789& timestamp=2008-08-0609:43:50& text=Hereisthe%20messagetext& charset=ISO-8859-1& moMsgId=b2aee337abd962489b123fda9c3480fa

You can also test the gateway (incoming and outgoing) for free from your browser: " Check SMS Gateway ".

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TM4B offers an easy to use web interface, but there are some restrictions on what content it can use (has nothing to do with music, gambling, drinking), BulkSMS is also very much appreciated and, again, we offer a very simple web interface.

I used it before (we have our own provider of SMS provider abstraction library), and both of them are as reliable as the main transport (SMS is not a guaranteed way of communication, so messages can go astray).

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We use AQL . They are the cheapest, but have never had a single problem. We use only for outgoing, but therefore I can not talk about incoming. Easy to use in .NET. Great web interface too.

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