I need to setup a completely self-contained email server.
This is for application testing purposes.
It needs to send and receive emails from SMTP, IMAP, POP3 clients but HOLD all emails in the server for users to view via webmail.
Users can send to any address but the email should not go anywhere, except, another mailbox in the same server.
The reason is I have PHP applications which send emails, and I need testers to view all emails during testing without sending them to the actual recipient.
Please explain your approach in your Bid. Describe operating system, software packages, etc, that will be used in your solution and main features offered.