[courier-users] Courier as virus/spam filter for another mail server

I would like to setup Courier as a incoming MTA that checks for spam and
viruses, then forwards cleaned message to another MTA for final delivery.

I have read through the man pages, and see two ways to do this.

(1) define a new subdomain despamed.domain.com and point the mx record
for that domain to the final MTA. then just use .dot-courier to forward
the cleaned message to the new subdomain. If possible, configure the
desination MTA to only accept connections from the Courier IP.

(2) write a program that takes an email message on STDIN and talks SMTP
to the destination MTA to send the messsage.

Have I missed any options?

Any experiences or recommendations for either approach? (1) seems _way_
easier.

Regards,

Mark



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