8080 is a shortcode. Not a normal text message. Companies pay to have their short codes on different networks and with different carriers/service providers. It is possible your carrier blocks it, or, depending on your service, it is blocked by the type of service you have.
The only way to know for sure is to contact your carrier/service provider and ask them. Talk to tech support there. And if they say they don't know, then ask to speak to someone else. If necessary a supervisor even. Someone always knows.