1. A method, comprising: a computer system receiving, via a web interface, a subscription preference relating to one or more message topics and a telephone number corresponding to a portable communication device capable of receiving text messages; in response to receiving the telephone number, the computer system generating an authorization code and causing a text message including the authorization code to be sent to the telephone number; receiving at the computer system, via the web interface, input that includes the authorization code; and in response to authenticating the authorization code, the computer system storing the subscription preference relating to the one or more message topics on a non-transitory computer readable storage medium, wherein the stored subscription preference indicates the computer system has permission to cause one or more text messages that include content directed to the one or more message topics to be sent to the telephone number corresponding to the portable communication device.
3. The method of claim 1 , further comprising receiving, via the web interface, a different subscription preference relating to a different message topic; and storing the different subscription preference on the non-transitory computer readable storage medium, wherein the subscription preference and the different subscription preference indicate permission to send content based on two or more of the message topics to the telephone number corresponding to the portable communication device.