You may have recently read the article by the Texas Association of Realtors about email/text message legal disclaimers.  Great information but leaves it up to you to determine what to say.  In today’s litigious society, people may try to claim they had a contract with you based off of email/text messages.  Here’s example text you can use as is or modify as necessary to avoid a binding contract.

The contents of this email message and any attachments are intended solely for the addressee(s) and may contain confidential and/or privileged information and may be legally protected from disclosure. If you are not the intended recipient of this message or their agent, or if this message has been addressed to you in error, please immediately alert the sender by reply email and then delete this message and any attachments. If you are not the intended recipient, you are hereby notified that any use, dissemination, copying, or storage of this message or its attachments is strictly prohibited.