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	What is SPF (Sender Permitted From)?
	Does SPF break email forwarding?
	What is the supported way to use RBL lists?
	My server failed therelay check at maps...what will I do?
	I use RBL lists on my qmail server, how do I allow certain email addresses to bypass RBL
	I use several RBL lists, but these checks take some time, can I speed this up?
	I use the tcp.smtp file to block known spammers by IP...is this a good practice?
	How do I block viruses using qmail?
	As a method of spam prevention, should I bounce email that comes from servers that are not the MX of the senders domain?