how to email Request For Proposal (RFP) to tenderer or potential bidder

And, so, after painstakingly edited and compose the dreaded Request for Proposal (RFP), it's time to email to various vendors or bidders to submit their proposal. What is the best way? I found this:

TO: Send to 1 vendor at a time.

SUBJECT: CUSTOMER NAME ? RFP: A new content management system

I am pleased to invite you to submit a proposal for the BRIEF PROJECT DESCRIPTION for CUSTOMER NAME in CITY.

CUSTOMER NAME is not looking to go through an extensive requirements process at this stage. Instead the attached short document provides a focus on key evaluation criteria and concrete business scenarios. We hope it will provide you helpful information about the project, the business context and enable you to submit your tender.

The main objective of our project is to OBJECTIVE. The specific project objectives as well as its context and timelines are explained in the attached document.

Your proposal should specifically address the needs and business scenarios outlined in the attached document. For each specific need, it should clearly articulate how your product solves the problem.

Please note that proposals must be received by DEADLINE. WHAT HAPPENS NEXT; e.g. two or three selected vendors will pass to the second phase where they will be invited to CITY for a proof of concept presentation. Final vendor selection is expected DATE.

OPTIONAL: CUSTOMER NAME has engaged (vendor-neutral) consultants CONSULTANT NAME for assisting in the evaluation of the proposals.

If you have any queries, we would be happy to answer them in a conference call that will be arranged one week before the proposal deadline.

Please do not forward this email externally without our permission.
We would appreciate a brief receipt confirming that you have received this and look forward to receiving your proposal.

Reference:

1. J.Boye - Best practice email when submitting RFP