FAQ:Email to SMS
What is iSMS Email to SMS service?
With iSMS Email to SMS service, you can send and receive text messages from your email account to mobile phones, without login to iSMS Portal. It let's you send text messages to mobiles from anywhere as long as you can send an email from e.g. Yahoo! mail, Microsoft Outlook, gmail or any other email client.
How do I send a text message by email?
Kindly refer to HERE