A developer can use Twilio Functions and SendGrid to forward incoming SMS messages sent to their Twilio number directly to their email address. To do this, they need a Twilio account and phone number, as well as a SendGrid account. They must also configure environment variables for the SendGrid API key and email addresses used to receive and send emails. The developer writes a single Twilio Function using Node.js and the got package, which makes HTTP requests easily. The function sends a JSON object to the SendGrid API to send an email with the incoming SMS message details. After configuring the Function and hooking up their Twilio number, the developer can test it by sending a text message to their number and checking their email for the forwarded message. This solution eliminates the need for a separate server, making it a convenient option for bits of plumbing like this using Twilio numbers.