The default setting for the Email to SMS feature includes the subject line in a message, but you can easily deactivate this setting if you prefer.
Disable the Subject Line in E2S Messages
1. In the menu, click on the Settings menu item, then select Messaging Settings.
2. FInd where it says Email to SMS, and click on Update:
3. Next to the Settings heading, click on Edit:
4. Select the option for Exclude subject line from SMS content.
5. Now click OK to save your changes and you're done: