How do I set up Email to SMS?
Contents of this help article:
Details on how to use the Email to SMS function can be found here: Sending SMS via EmailEmail to SMS allows you to send one or more SMS from your mail account via our gateway.
The first setup
Log in to the webapp and navigate to the Mail to SMS settings via the Developer menu item.
To be able to send SMS via mail, you need a sender address.
You can create this via the round green button with the plus on the bottom right.
A window opens where you can define a new sender address. 
In the field Sender email address you enter the mail address from which you want to send the mail. It is also possible to specify all email addresses from a particular domain. To do this, enter the address in the format *@domain.com, for example *@seven.io.
In the Key field, enter a password that makes sending SMS via mail more secure. You can choose this key freely, but you may only use lower and upper case letters, numbers and the following special characters: - _ $ (hyphen, underscore and dollar sign).
In the Error mail address field you can specify a mail address to which you want to receive error messages. If you do not enter an address here, you will receive error messages at the sender address if you have activated error messages via mail in the additional settings.
Additional settings
You can click the settings button at the top right (blue cogs) for additional settings:
Maximum SMS length
Here you can specify a maximum number of characters after which the text of the mail is cut off and not sent. This is mainly to avoid unnecessary costs if signatures or similar attachments are sent by mistake.
To have better control over what you send, you can also enclose your SMS text in double hashs: ##This is your text##
Everything outside these characters is not sent in the SMS.
Remove quotes
Ensures that text passages that are placed in quotation marks are not sent in the SMS.
Notify on error
Here you can specify whether you want to receive error messages via email and HTTP request to your server.
Insert Email Sender in SMS
If you want, you can include your email address or part of it at the beginning of your SMS.
You can choose between three options:
Full address - inserts the entire address, e.g. "username@domain.com".
Local part of the address - e.g. "username" is inserted when sending from username@domain.com
No - does not send any parts of the address
If you want your SMS to be sent from a specific sender name, set a default sender name that can contain up to 11 alphanumeric characters. This name or this phone number will be used for all of your SMS if you do not specify another sender. Please note that replies are only possible to those SMS that have a number set as the sender name.
If you have any questions, please feel free to contact our support.