Correct smtpd(6) to discuss ratfs(4).
 [rsc] --rw-rw-r-- M 1250499 glenda sys 8178 Jan 25 07:19 sys/man/6/smtpd
	/n/sourcesdump/2006/0125/plan9/sys/man/6/smtpd:204,221 - 
	/n/sourcesdump/2006/0126/plan9/sys/man/6/smtpd:204,223
	  or the destination domain is specified in
	  .BR ourdomains .
	  .SS Blocked Addresses
	- When
	- .B /mail/lib/blocked
	- exists and is readable,
	- .I smtpd
	- reads a list of banned addresses from it.
	+ .I Smtpd
	+ consults
	+ .B /mail/ratify
	+ (see
	+ .IR ratfs (4))
	+ for a list of banned addresses.
	  Messages received from these addresses are
	  rejected with a 5\fIxx\fP-series SMTP error code.
	  There is no option
	- to turn blocking on or off; if the file is accessible,
	- blocking is enabled on all
	+ to turn blocking on or off; if 
	+ .B /mail/ratify
	+ is mounted,
	  .I smtpd
	- sessions, including those from trusted networks.
	+ will use it, even for connections from trusted networks.
	  .PP
	  The command line format and address specifications
	  conform to the notation described above.  If the parameters
	/n/sourcesdump/2006/0125/plan9/sys/man/6/smtpd:303,306 - 
	/n/sourcesdump/2006/0126/plan9/sys/man/6/smtpd:305,309
	  to exposed systems.
	  .SH "SEE ALSO"
	  .IR mail (1),
	+ .IR ratfs (4),
	  .IR scanmail (8)