Blocks expire after 90 days.
If you’ve already signed in, you can simply enter, “Block Internet Spam,” into the “I want to,” search tool on the Account Management Overview Page.
You can block as many as 15 email addresses, text names and domains. The information you block will prevent incoming texts, pictures and video messages. If you have more than five sources you would like to block, click, “Block Another Contact,” to add more. If you would like to block all messages from any sender, you can do so in the “Message Blocking” preferences section at the bottom of the page.
The service also lets you block calls during a certain time of day and prevent outgoing calls to 411 directory assistance.
