The linked page seems to describe it adequately. If you are in North America, you can do this for free (for the sender) through the gateway provided by each of the carriers. I don't believe that text messages are normally screened for Spam so the chances of it being delivered as a text message is probably better than for a normal email (close to 100%?). When you say "large text messages" did you really mean a large number or do you mean each message will be large? A text message should preferably fit into one physical SMS message of 160 char. It is a "short message service".
chrishea
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Unless your web host is very restrictive, I don't think it will be a problem, especially if they aren't being done in one big blast. I have sent thousands of emails in a day without it being an issue. You can also build the program to pace the output so it sleeps after every one or after a certain number have been sent.
chrishea
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I have never heard that they do any spam filtering on these gateways but I suppose that it is possible. If you were sending to every number in a certain range in a big blast then that might trigger a reaction. If you are sending to random numbers in smaller batches, I doubt that it will be a problem. What could create a problem is if any of the recipients aren't happy with what you are sending them and complain to the phone company.
chrishea
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