Gov with the RFB's number and title in the subject line of your e-mail. We've rounded up 4 unique methods for writing proposal submission emails.Plus, we've got email samples for each method. See the 'Invitation to Bid' Email Overview section for more information on viewing and submitting your bid from the 'Invitation to Bid' email. Because every RFP response will compete with another company's proposal, writing a winning proposal is all about standing out. This tutorial walks you through the steps to write and submit a winning proposal for a government contract. Discover what a bid proposal is, the elements of a bid proposal, how to create one and a template and example that can guide you. Most RFP invitation emails should include a greeting, introduction and summary, highlights, next steps and closing. Our commercial general contractors are ready to get started on your next commercial construction project. Request a bid to get started today!