If you're on a post-paid account and log into your on-line MyVerizon account, look under Manage My Device and click the blue Block Calls and Messages. At the top of the page, click the blue Manage Family Safeguards & Controls. Scroll down to Internet Spam Blocking, then click the blue View Details & Edit. Choose the appropriate line at the top, if applicable. Check the boxes for 'block all text messages sent from the web' and 'block all text messages sent from e-mail', then click Apply.
