We link to wherever the issuer prefers to receive proposals. The options include a URL, email, or direct message on Prosal.
For instance, if you select 'Respond to Prosal' and it opens in Gmail, it's because the issuer has chosen to receive it via email. There's likely an email in the RFP or one that opened in your Gmail that the issuer would like to receive, providing a clear and straightforward submission process.
We encourage you to review the RFP closely to find details about how to respond to an RFP.