# Email to SMS

Sending text messages by sending an email, from Outlook, any email client or your own systems.

Email to SMS turns an email into a text message. It suits staff who work from their inbox and systems that already send email alerts.

## Pages in this section

- [Send SMS by email](https://iflow.net/docs/email-to-sms/send-by-email/): Send a text message by sending an email: addressing, message length and the subject line settings.
- [Gateway keys](https://iflow.net/docs/email-to-sms/gateway-keys/): Add the X-IFLOW-GWAY-KEY header to emails sent to the email to SMS gateway, with examples for .NET, Rails and PHP.

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Source: https://iflow.net/docs/email-to-sms/