Make sure you include the following-

1) Material type
2) Is a material quote required or is material supplied.
3) Quantity
4) Drawings should be immediately available or necessary specs.
5) Required time frame
6) RFQ ending time
7) Full contact information should be supplied upon first contact by email from both parties, neither should have to reply to @.com
8) If you the RFQ poster needs help in some of the technical areas then that should be made know initially.
9) Make known any special treatments/finishes not necessarily related to the machining process.

Thanks
Management