Welcome to iMore! I don't believe there's a way to forward a text message via email but you can copy and paste the text into a new email message:
1. Press and hold on the text you want to copy over until the pop-up menu appears
2. Select Copy
3. Open whatever email app you're using and start a new message
4. Tap on the body area of the email message to display the pop-up menu and select Paste
Alternatively, you can take a screenshot of the message(s) you want to send and attach the image to an email.
01-05-2016 03:21 PM