SMTP Backup MX Server with individual email accounts
I am trying to set up a backup email solution for my Exchange 2003 Server with 25 users. I have MailEnable email Server setup on a second server with the backup SMTP MX record setup correctly. It works fine, however I want individual users to be able to login there to get there email in the event my Exchange Server is down. I would like them to be able to use the web based interface of MailEnable.
As soon as I give an individual user an account on the MailEnable server any emails received by MailEnable while Exchange is off line do not get delivered when Exchange comes back on line.
I know that I can do this with POP3 but I don't want to do that because I don't want to have to manage the individual passwords on the POP3Connector of Exchange and on MailEnable individual accounts. In general I don't like the POP3Connector and don't want to use it.
I don't want to use a second Exchange Server because I don't want to buy a server, OS, Exchange, CALs just for this.
Acutally I would like to use Linux and qMail for this so I don't have to buy anything.
Is what I am trying to do possible with SMTP only on a single Exchange Server?